So many times I'm trying to reason with them, to not post low quality photos and instead of seeing some improvement, what I get is a fight, they trying to convince me that those photos are ok.

Hahaha I saw one of those this morning, you muted one from a Venezuelan lady.
Not too bad posts, she done one in Collectors community which was ok.
But yeah, here photographs much below par, at least not close to amateur level, let alone to professional level.
Users are complaining when they get muted, I have all the experience with that in one of the communities I manage.
Even with same clear community rules, muted posts/users usually started to fight, or to twist the rules in their favour.
Some even continues to post whatever was muted.