As someone said, "This question has been posted at least a 1000 times over the years"

But if it is so common and returns again and again then it must be a real problem so why not fix it?  Nothing could be easier it has already been done. Leave everything as it is and add one(1) more gallery, that only accept screened submissions. Every time you upload a picture you should have an option to apply to be included in this special gallery. The request are screened by a team of experts. (Working for free of course).

So in this special gallery only the creme de la creme is accepted and you're supposed to accept constructive criticism. If you don't want that carry on as before. Nothing has changed for you.

Quod erat demonstrandum - the problem can easily be remediated.