I mean at least for video games especially ones that are live service games having a place to go to talk about the game and new changes is really nice and still a thing I miss a lot about Reddit.

Disagree, there were, possibly still are, good ones. A handful around mushrooms cultivation, food preserving, food fermentation and personal finance specific to my country come to mind, lots of high quality content.

But I know what you mean. I think it mainly happens once specific subreddits started going mainstream, often with an influxnl from facebook people. Out of all the fermented stuff, the kombucha one made my eyes bleed due to its popularity. Half the posts where new people asking if they had a mold problem, the other half was existing members posting "read this before posting, this is what mold looks like", but they were obviously ignored lol

In principle, I agree with you. But you are judging Reddit's value by the looking at the home page and taking a snapshot. Instead of looking at it as a lake of mostly crap, think of it as Instead of a river that filters things out and holds the not-crap that come from the flood.