What does someone having artwork of there own have to do with art critique?
Critics never produce art; else they would not be critics, they would be artists.

Ask for critical comments -> get critical comments -> complain about critical comments.
That doesn't seem very logical to me.
Someone uploading has to ask for critical comments to get them.
If someone only wants '5Star++++ Hugs!!!! xoxoxo" comments, then they can opt for that when they upload.

EDIT - expecting serious constructive criticism from an 'open to the public' gallery is unrealistic.

Friends don't let friends use booleans.