I think you severely underestimate how employee friendly tech is. I’d be extremely surprised if giving your manager a bad review put you at serious risk of retaliation at Google or similar.

Anecdotally I do actually work in management at a small tech firm, and when I got a mediocre review for an area of my work, I just worked on getting better at that area instead of trying to retaliate, since that would be dumb and bad for everyone involved.