I tend to avoid all of the Incarnon weapons/AOE because they just made the game boring for me. DE over did it with powercreep, especially AOE weapons that have had no downsides shortly after the Bramma was released until more recently with the ammo nerfs that are a blanket nerf for everything.

A lot of the lesser used gear tends to be more fun for me, I like trying to make MR Fodder endgame viable. Learn to play differen frames you aren't used to; Banshee is rarely used, but she has some great abilities if you know how to make her survive through harder content.

I also don't bother with shield gating through dragon keys, immortality does not make the game interesting.

If you're burnt out just take a break. It's more fun coming back to the game after an update than it is doing the same thing waiting for the next update to drop.

Yes there are and they stopped playing for a few months and come back or not. Play something else for a bit, you clearly got burned out

You pretty much are at the point where you can do anything "Comfortably" or just Play something else without feeling like Missing Out on here. I was there too, and I just kept striving for things that interested me, like making a Zaw with a certain theme (Which now is my most played Melee) or getting a Riven for my most used Weapons, Making my Main Warframe viable for any Mission, you get the idea. Setting goals out of pure interest is my suggestion

At the end of the day, warframe is a collector's game. Unlocking weapons and warframes, getting mastery rank higher, getting all the mods and arcanes... It's a grueling slow process but pretty satisfying at the end. If you're not feeling it now maybe you just need to take a break from the game as others said here, but it does boil down to personal goals and what you want to do. The game is not good at giving you stuff to do, they've been trying with nightwave but it's kinda meh.

Helping new players is the true end game.

The bad part about playing wf now is the crazy power creep. Once you get those meta incarnons, everything else feels lackluster. As someone who has done it all on Switch and re-grinding on PS5 the best advice I can give you is to play the game based on what you like to do best. For me, I riven trade alot so I tend to farm SE/slivers and do the weekly archons.

The simple answer is go ahead and play. Launch a mission that you like and that's it. Most of the time I play missions I enjoy without any real purpose behind it.

Now I understand the feeling of not knowing what to do. I will share what helped me on my journey. Seeing you already maxed out most of the syndicates you are certainly better than me at the game and well if i sound stupid maybe this will help you find your own motivation in the game.

I see 2 things. First are objectives the game give us usually on a weekly basis and second are what you want to do in the game.

For the first part well I look at what the game proposes and play it or not: archon hunt - sortie - invasions - nightwave... That was the easy part. Let the game decide for you without thinking too much.

The second part look the most complex but we can simply talk about farming, mastering the game and playing just for the fun of playing.

About farming: There is content I do because I need to farm it. Be it to upgrade my gear or farm mastery fodders. Taking time outside the game to note and regroup what I need to farm really helps me come into the game in a dynamic way.

Creating your Dojo can be a source of motivation for farming (and decoration).

About mastering the game: This is where it is endless and fun. You can decide to master certain aspects of the game. It can be a frame or a mission type or even the movement system. Giving yourself a goal really help. For me at the moment I learn to master void cascade solo and after that I will dedicate to disruption as I do avoid it completely. I plan to learn Ash and farm a gear for her. Before that I had a lot of fun learning to improve my mouvement in warframe. you get the idea i think.

Also a question: Is there not a frame you want to test / learn / master / try in different build? If so this wil give you somewhere to look at and help decide on missions to do.

And lastly about having fun: well there should be some content you like in the game, no? Just play it. Most of my early game was me having fun on the Kdrive. I remember how I was having a blast (and a lot of suffering) trying to get good at it and doing all the races.

Maybe take little step back, maybe watch content creator, maybe create a Dojo and let your mind suggest "oh! I wanna try that!" and go when the feeling is there.

For weapons i find a lot of how bad I find certain guns depend on my mindstate. For years my favorite weapon has been and still is the Braton prime (not a big fan of the incarnon mode on it so I just use the base version the vast majority of the time). Was it a good gun to take into steel path before its incarnon, not really. That is part of the charm however, nuking entire rooms with aoe is fun, but sometime I want just me and grandpa Braton to shoot Grineer in the face one at a time like the old days. If anything I find I enjoy it slightly less now that the incarnon is buffing up the base stats. Maybe I should see how far I can push the mk1 version instead?

It sound like you're reaching burnout territory however in which case my recommendation is just take a break whenever you start playing as a obligation instead of just because it's fun. Come back either when a new update drops (in this case Kullervo is just around the corner), or you just feel like playing again.

There's a lot to do as a personal goal (personally i'm working on legend 1 and maxing out the helminth), but if you burn out from the grind getting there then that sort of ruins the point no?

Play something else for a bit, warframe will be there when you feel like doing space ninja stuff again.

I guess at that point for me, it was collect everything and reach MR30. Max out every Syndicate, collect every free Operator cosmetic, every arcane (still working on that), etc.

Warframe is a game of farming, so I set farming goals.

You might just be done. Back before games as a service people used to finish games all the time.

A lot of people will take breaks, sometimes for a year or longer, and come back when there's new content or they've just got the itch.

I think it boils down to whether or not you still enjoy the base in-game activities. Because if you don't - just take a break, you're most likely burnt out. If you do, but certain frames/weapons make it too easy then just go offmeta, pick something that is fun mechanically and try to make it work

IDK im a completionist myself, but im at MR20 and havent done half the stuff you have, seems like you went a little too fast imo

Grinding out cosmetics and making your orbiter/dormizone/dojo/warframe look cool is the end-game.

"Every other weapon feels like a downgrade of incarnons."

Have you tried Kuva Brama? Or Kuva and Tennet weapons in general? Or Stropha? Have you maxed out Duviri Intrinsics? Railjack intrinsics? Have you framed Teshin armor for Operator from Steel Path? Do you have all Galvanized mods from Arbitrations?

Sounds like it is time to collect Incarnon Genesiseseses from Steel Path circuit.