Palpatine did want Rey to come to Exegol, but her parents abandoned her and now he doesn’t know where she is, so he turns to Ben Solo because he does know where he is, and turns him to the dark side — he wants the blood descendant of the Skywalkers to perform the Sith ritual so he would possess his body. Palpatine tells Kylo to kill Rey because at this point he no longer has any use for her and Kylo is already this far into the dark side, it is too late to possess Rey at this point.
Um…what? None of that is established in the movie. And why not just possess Kylo if “he wants the blood descendant of the Skywalkers to perform the Sith ritual”?
Hux does not betray the First Order altogether, he sent in the information so Kylo Ren would lose. Unless you’re referring to, “I don’t care if you guys win,” Hux is just saying that so Finn and Poe wouldn’t kill him.
Oh shoot, I didn’t realize we could just arbitrarily decide when the script is lying to us or not. Cool beans.
In that case, I declare that Palps was lying to Kylo when he said that Rey is his granddaughter. Rey Palpatine is officially no longer canon!
But in all honestly, is there any way to make Palps say “I was lying when I said you were a Palpatine. I just needed to lure you here…”? That would be a clever angle to take the film, having Palps’s plan make sense, without ret-conning TLJ.