You could always criticize them, you just couldn't be lazy about your criticism.
I've many times talked about the inconsistency in character development, the trend to "give backstory and then kill a character," and the absolutely nauseating camera movement (especially in the early seasons) of Discovery, for example. Never even got a warning, nor my posts removed.
There was a major thread like a year back talking about how in Disco, the actors don't actually move about a scene when they do things. The movement is from room to room, and then they are stuck in place as they talk and it really throws you out of it.
Edit: In fact, there's literally a post critiquing season 4 of Discovery right now on their front page with healthy discussion in the comments.
All of these were allowed before and still.