His opinion on the server doesn't matter, he's free to criticize the server even if he's moderating it.
If he weren't allowed to do that then we'd have a problem.
And the RNG box shit basically everyone knew and even asked for it on forums.
I see no issue with this.
He isn't saying the server is about to go down as worse than Trion, he just feels like it is, which is his own opinion.
Now in terms of sharing inside information that nobody could've guessed/assumed, if he does do that then we have problem as well. (This isn't a case of it.)
It's not like IronLady/Sparkle can moderate what he says about the server in a private discord chat but he should watch what he says in regards to it. (And appropriate action should be taken if something like that comes up.)
Another point is that passing off as someone else on Discord is easy as shit to do and Krowley can't really prove that it wasn't him. (No, the Discord tag doesn't mean anything because it can be changed very easily.)
Just my 2 cents.