willie_901
Veteran
Commenting on images is problematic. APUG has two galleries, one where you can only say nice things, and one where you can critique. Hopefully it won't come to that here.
Image comments are problematic because they require moderation to delete toxic, inauthentic criticism.
Years ago my feedback on Flickr was meaningless because people only said nice things. We can learn from positive comments. But we can learn from authentic criticism too. Authentic criticism is the same as saying nice things. Constructive criticism can be objective or subjective.
For example, when I was learning commercial interiors photography I read a comment about someones photo that stated, "No one will take you seriously if your photographs have converging verticals." For interiors photography, this is an important lesson. A counter example was, "The angle of view is way too wide in your composition. The viewers don't know what to look at or what's important about the space your trying to sell". This authentic criticism is somewhat subjective because some clients prefer photographs that make the space seem larger than it happens to be.
Toxic on-line comments do not constitute criticism. They are just a cowardly way to bully and project meanness.