Sarcasm is an adjusted stress reaction.

I've hated nearly everything recommended as "optimistic and hopeful speculative fiction" in the last few years. I like my worldbuilding and situations complicated! I want characters to make mistakes!

I can sympathize. I tend to find more satisfaction and actual optimism in stories with messy, ugly, and even horrifying things happening and there being reasons to hope and the power to make things better in those situations than a lot of what's presented as optimistic and hopeful and is just...nowhere near as compelling, and often more than a bit handwavey?