My advice would be to put the ideas somewhere you'll remember them. I just tuck them in a spare corner of my brain, but writing it down might work for other people. Revisit them later. If they're still seeming irredeemably terrible later, then discard them if you like.

I understand your need for validation, and I'm not saying that in a "but now I'm going to dismiss it" way. I understand it pretty viscerally. It might be a spectrum thing, it might not, but I always feel this pressure to be *helpful* to people in some way. I know my writing depends on me talking ideas over with people, because that's how I refine ideas. Yours might as well.

I *know* the urge to do something new and exciting. Brains jump around. Most of my ideas aren't that great either. I can't help you with it, but it sounds like you need to have a talk with your brain and figure out whether you want new or whether it wants new.

And sometimes "oh no, my writing is awful" is just the curse of writing, but it does still hurt. :/

New and crazy doesn't have to automatically mean bad - but it doesn't automatically mean good, either. You seem to come up with a lot of ideas and just run with them. Maybe it would be better to focus on really exploring and fleshing out an idea, rather than just throwing it out there?

Also, new ideas are good, but you seem to want to do something that'll leave an impact. Which I think you should focus on doing through good writing and memorable characters, not wild ideas.