I think that characterization of Kylo Ren works well. He didn’t actually complete his training it looks like, plus it doesn’t look like he has any other mentors to refine his shit. He’s just full of all that unbridled anger and passion but hasn’t found a way to refine it into dark side powery goodness. He’s still…

Regarding 4 - this is that Anakin type character done well. He is fraight with uncertainty and fear. He thinks his power will make him feel better. He isn’t in control. He actually seemed mentally unstable, versus Hayden’s “I’m acting... I’m mad.. meeeeeeh” performances (though more Lucas’s fault than his).