It was just so incoherent. Not just the plot but also the purpose, what story or theme was there to it? We were comparing it to the Attack of the Clones, which has always been our 'worst Star Wars' to date and thinking that at least we knew what Lucas was trying to achieve, even if he did it really badly. What was Rian trying to achieve? I find it quite hard to even summarize what happened, especially as a large part of the plot was totally pointless, it didn't help the protagonists or move anyone's story along.
Rebels/Rebellions (not New Republicans for unknown reasons) are reduced from quite small numbers to very small numbers, while their leaders die or adopt incomprehensible strategies they keep secret from their people who (not surprisingly) think they are going to die but somehow that is a victory because of 'hope'.
Rey changed from cool interesting powerful character to girl who cries a lot, suddenly desperately needs to know who her parents were, doesn't get any training or mentoring, isn't all that powerful anymore and gets wistful over Finn for unknown reasons.
Finn basically reruns his Force Awakens arc for unknown reasons (is a coward, gets courage, has adventures, likes a girl)
Poe does hero stuff and gets stuffed. Oh and stops doing anything vaguely gay.
Rose introduced for no particular reason. Is she just there so that white Rey and gay Poe don't get it on with Finn? I mean I quite liked her but what was her purpose? The plot bit of finding the code cracker was totally pointless.
Luke is just totally wasted. No reason given why Episode 6 Luke, who was calm, cool, wise and generally pretty wonderful basically turns into a bit of a loser who thinks about killing his nephew for his darkness (where he refused to believe his very very bad father was irredeemable) and then goes on an epic guilty sulk while everything goes wrong. Because of Snoke apparently although we never learn who Snoke is or what he did, and frankly given that he goes down like a punk was surely worth Luke at least trying to oppose.
Leia got some nice scenes, but why did they decide to have her in a coma for a big chunk of the film? I was really hoping that she'd have some time with Rey.
The only character that seemed to develop at all was Kylo, but even then he was back to tantrumming by the end of the film.