The negativity on Reddit game dev subreddits does annoy me (nobody seems to think anyone will ever get anywhere with a game and should just give up and get a corporate job), but I think that the worse thing is how surface-level and superficial the conversations are. You hardly ever get a post about how they implemented some interesting feature, or how they came up with their art style or whatever. It's mostly just "Should I use Unreal or Unity?", "Is Godot the answer to all my problems", or self-promotion.