I'm thankful for all the nice replies, but also let me clarify something: I didn't think of it as complaining. People can have their opinions and share them without demanding anything, and that's the usual attitude with these posts. I also don't think I'm infallible so it can be helpful if someone points out a flaw I missed.
It can be annoying when it's about things I already spent a lot of time thinking about or when this is the best I can do, but how are they supposed to know?