If you post it anyway (maybe a top-level post for visibility?), I’ll strong-upvote it. I vehemently disagree with you, but even more vehemently than that, I disagree with allowing this class of expense to conceal potentially-useful information, like big critiques.
I think you’re ignoring the harms from posting something uncivil. Civility is an extremely important norm. I would not support something that is directly insulting, even if it is an important critique.
However, I did strong-upvote this comment (meaning sirjackholland’s comment on this post) and I applaud them both for not publishing their original critique and for expressing their position anyway.