One of the most important lessons I ever learned about art was when I became a late addition to the editorial board for the literature part of my high school's lit/art magazine, which nobody ever read.
Because I realized after a couple of meetings that my moments of baffled distress during them were centering around a pattern of our votes electing by majority to reject most of the good, interesting stuff and agree to publish the very bland.
So I was looking around this room of people I mostly liked or respected if not both, trying to figure out what the fuck when there was no reasonable way of asking, until the day we by majority vote sent definitely the best thing submitted all year back pending 'revisions' which of course would not be made, because the poet would definitely either become demoralized or know for damn sure she was too good for our stupid journal. I have no idea which it was; it's a question of mindset, and the submissions were anonymous.
This good poem was rejected for two reasons, both of which were actually manifestations of it being good. One was that it had made a couple of the board uncomfortable--not by having any shocking subject material, mind, just by provoking emotions with unusual descriptive language and indirectness--and they'd transmitted that uneasiness throughout the group during discussion.
And the other, seized upon as an excuse in light of the first, was that by being complex in terms of both structure and notion it had drawn several of us in, interested enough to engage critically and respond in depth, and so we'd marked it up with lots of places we thought a word choice could have been a little stronger, a line break had been a little odd; ways we thought it could have been a more excellent version of the poem we perceived in it. None of them ways it was actually bad. Just places we felt it could have been better.
At the same meeting, we voted to accept a poem that was an utterly tepid rectangle of predictable nothing-in-particular, because no one could find anything in it to object to.
It wasn't good. It wasn't noticeably bad, either, though; it was one consistent level of mediocrity clear through, and thus no part of it stood out as a weakness, and therefore the committee found it more acceptable than the poem that was superior in every way, but which by being daring and interesting had left itself covered in vulnerable places.
The understanding I reached as a result of this experience was multi-layered and difficult to articulate, but the most important part, I think, to share is that the value and quality of a work are not, in fact, very well measured by how many negative things you can find to say about it.