I actually leaned into the idea that Kylo didn’t commit many atrocities except for killing Han. For example, I used the canon idea that a Force storm Kylo couldn’t control destroyed the temple, and he didn’t actually kill anybody there intentionally. It makes it all the more tragic, and makes it more relatable to want Ben survive after his redemption (which is what happens). What I like about Kylo is that he’s trying to be somebody he isn’t, so when he finally becomes Ben again it’s more rewarding.
Vader commited genocide and yet he’s redeemable. I also feel like Ben’s conflicted soul only came around at some point before TFA.
Also Kylo and his Knights slaughtered people in a rainy environment, and he himself killed Tekka.
Off-topic now, but I’m really enjoying adding holocam droids to the battle of Crait. Essentially, at the beginning of it I’m having Hux insist that the whole thing is to be recorded for the galaxy to witness. This then leads into a custom Canto Bight scene I’m doing with Lando where the gamblers are betting on the outcome of the fight (because they see it as a game), which disgusts him. The holocam droids also explain why the First Order lets Finn and Rose escape to the base, because Hux wants the galaxy to see their weakness. And, finally, it allows the entire galaxy to see the badass Luke that inspires them.