It does not have an identical effect. For one, the listener has a reason to listen to you with regards to the former. For two, everyone else is not provided with a reason to pull the ripcord and avoid you entirely.

I understand the point of view that yes, it may have advantages to abuse people for your immediate and short-term desires. The attempt to cast abuse as valid for those advantages belies the truth of a nasty participant in the body politic.

I think saying “this sucks” can actually make certain personality types want to really dive in and analyze their own thought process.

I’ve wotked with people who genuinely respond well to that kind of feedback. It seems you think one-size fits all, and fits every situation?

In a public space, which is the implicit context of everything we are talking about here? No. Because listeners matter, too.

If you want to tell somebody in a 1:1 "this sucks" when you know--know, not assume--that that is their preferred mode of communication? Sure. Fine. I think that resorting to such modes of communication makes you a lousy leader because it's important to train your people out of high-tension and low-value communications, but fine. But y'know what? Nobody here is talking about that situation, so table it and move on.

I won't reply to your diversion again.