Francis should have been in it more, in her few scenes as the cult leader she was more convincing at it than Evan was in ten episodes. The fact that his character has just reverted back to being a stereotype is also really annoying, they had something interesting going on with him essentially being an agent of chaos that supported no one or nothing that didn't benefit him but now he's just a Trump fanboy and that's just boring.
Ally vs Kai should have been a storyline that started earlier, Ally's quite a good character now that she's doing something other than screaming but it's so problematic that all her character development happened offscreen.
The Sharon Tate stuff was vile and completely unnecessary and it highlighted the biggest issue with this season, shallow violence for the sake of covering up a weak plot. The use of the Manson murders for nothing more than cheap violence was just vulgar. I almost switched off at that point tbh. It was just so tone deaf.