There are good live service games, but the blatant monetization bothers some people.

Take Warframe, one of the most popular live service games. Everything can be earned in game, including the premium currency as long as you're willing to put in time and effort. However, every single UI element offers a way to spend that premium currency with higher presentation priority than the actual in-universe methods of doing whatever that menu is for.

Want a specific gun? Only 500 platinum for a fully kitted out model* (or 25,000 credits for the blueprint you actually want, and it wasn't until fairly recently that they added tooltips showing where to earn things in-game). Building something? Only 20 platinum to rush construction, or you could wait a day. Want to customize your frame? Here's a few dozen color palettes, 99% of which cost platinum.

* Which is such an awful newbie trap. Don't buy weapons or frames off the Market in Warframe, kids. Their Prime variants, which are statistically superior, can be bought off other players for a fraction of what DE charges for the inferior regular versions. The Market is hilariously, blatantly overpriced and has been since the very beginning.

Space Engineers is another offender. It's a block-building game and all of its DLC is cosmetic skins, but even if you don't own the DLCs those skins show up as unique blocks in the block picker with a padlock icon that tells you to buy their associated DLC. It clutters up the UI to the point of worthlessness, but there's no way to turn it off because it acts as an advertisement.

Let's not even get into gacha games, which feed off of addictive impulses to have a small percentage of players pay thousands of dollars to subsidize everyone else who plays for free.

Live Service and Dark Patterns go together. Games as a Service requires a constant revenue stream to fund development, which incentivises predatory design patterns.