Additionally, between UE, Unity, and Godot, I don't feel like it's a lack of tools holding studios back. If you wanted even more games (but why - we're already drowning in a flood of them), one of the big steps might be to provide a stable funding solution for new developers so they didn't need to play financial Russian Roulette to create their art.
The days where being buried in the bottom of Steam listings is gone, as long as you aren't insisting on launching via Steam.
This is the hard part, as I see it. Maybe that's not as difficult as I think.
Also, creating and recording all of the voice lines. There must be hundreds, by a large and diverse cast.
you can avoid EA, Blizzard and Ubisoft very easily these days
Game engines are now cheap/free but what deep pockets buy are more and better artwork, level design, story writing, voice acting, sound design, background music, motion capture, etc. that are the hallmarks of AAA games. While small studios can (and do!) build great games, they can't replicate that because of the cost and I don't see a way to work around that. There's no way to automate artistry.
That's it.
Buy indie games, usually in Early Access if the game is something you like or would like.
Phasmophobia has made millions. Gunfire Reborn has made millions. Small game companies are more popular than ever. There's even a game about powerwashing out right now.