Figure out what you want to do, and make a plan to do it. Obviously some stuff is more achievable than others, but there are surely some things that you can do.

I've done enough. Who's saying I haven't?

Change your world not others. Ask yourself why is your happiness based on feedback from what others think of what you do? It’s terse, but “fuck ’em”. Did you do something to better the world, your life, the life of a random passing bug? If so, that’s a net gain in the world. Take the small wins.

Be moral. Be good. Find what makes you happy no matter what the rest of the world thinks.

Find peace and/in contentment. Realize that happy can be a euphoric high that’s not a constant, but a momentary state.

As your attorney, I advise you to buy a motorcycle.

Cannabis

Everyone needs challenging but achievable goals.

If you have the time to stress over such a meaningless feeling then you prolly aren't doing either enough in life or if you are, you prolly need to seek out a shrink to make sure you are neurochemically balanced.

The entire purpose of life is to make your own meaning out of life. Life is what you make it, kinda like the old waterboy quote, "I like to see homos naked"

Strangely enough, once I started giving drawing classes to kids last year as a volunteer, I no longer felt like my life had been pointless. It felt like I finally did something that would mean something. I was invited to give 1 or 2 classes only, as a test to see if I'd like it. Turns out I did like it way more than I could've imagined, as a I never fancied myself as a teacher. Apparently, the kids loved it, too. Not needing to fill out forms, reports and whatever bureaucracy teachers have to deal with also helps me look forward to this year's classes.

So, my take is that you should definitely try something different in your life, preferably something that puts you in face-to-face contact with other people