I disagree. "Bad" is a value judgement that is not optimized for maximum utility. In my opinion, there's usually little reason (signaling aside) to make fun of something rather than provide constructive criticism.

While it's certainly possible to use "bad" as a shortcut for "needs optimizing," the word "suboptimal" already means that and doesn't carry the same pejorative connotations.

The next depressing step is realizing you can't really do that. Maybe optimize the most important thing and pretend everything else is awesome?

You would want your noticing that something is bad to, in some way, indicate what would be a better way to make the thing better. You want to know what in particular is bad and can be fixed, rather than the less informative "everything". If your classifier triggers on everything, it tells you less on average about any given thing.