It personally troubles me, not just as a server owner but an artist. Maps are complicated things, they're art that also has to be functional. TF2 is also a hard game to balance, so it takes a lot of work.

Content creators in TF2 need more understanding and respect.

Treat maps like you would any art, constructive criticism is fine if requested, but don't throw insults at creators just because you don't like their work. Especially those trying to bring unique content from underrepresented cultures in a game like TF2.