I think that, plain and simple, what many people wanted TLJ to have been was unattainable. I think no matter what LFL/Disney/RJ/JJ did people would complain. That doesn’t mean complaints aren’t valid. It means they’re damned if they do and they’re damned if they don’t.
There’s too much humor. There’s not enough humor. It’s the wrong humor. It’s too much like the OT. It’s not enough like the OT. This villain is too much like Palpatine; but now he’s dead and should have been more like Palpatine. That villain is not enough like Vader. I can’t remember the characters’ names after one viewing. The music isn’t memorable enough after one viewing and having not listened to the score.