I think it's rather subjective. Justice League was clearly a hatchet job that started with the studio interfering. They did it with BvS, forcing a cut-down theatrical release, and then used that as ammunition to blame Snyder for what was an even worse theatrical release of JL. After fans got to experience the better-paced BvS UE, it was very clear that the studio was the reason for the awful theatrical release. Fans asking for a release of the director's version made complete sense IMO.
OTOH, you have something like SW:TLJ. I enjoyed that movie. I thought it was far better than Rise of Skywalker, and just a bit behind Force Awakens. I'm not a SW fan per se, but I've seen every movie in the franchise multiple times. I think the SW fanbase can be quite toxic, and the fact that they lobbed lots of sexist and racist hate towards Rei and Rose, left the impression that they weren't really judging TLJ on its artistic merits, so much as on their preconceived notions of what constitutes a SW movie. Rian Johnson is a fine director, and I was happy to see a SW movie that wasn't all fan service and trench runs. Hell, blame the lack of story planning by the studio, more than the director providing his own take on the franchise. So I thought the complaints were misplaced.
Similarly, GoT fans asking for a redo of Season 8 are also incredibly stupid. Martin should've finished the damn books. Weiss and Benioff needed more guidance than they got. They shouldn't have been left to their own devices. That said, we got what we got, and that's it. Asking for a redo is illogical.
In the end, studios need to trust the production teams they hire. Disney and Warner apparently trusted the teams for TLJ and GoT. They didn't for Justice League. So I think only JL earned demands from the fans, as we never got what the director intended. Suicide Squad also deserved a redo, and we're getting that as well. I'd love to see the Ayers cut, but that doesn't seem like it'll ever happen. At least we got the Snyder Cut. 1 win among many losses.