I'm not sure how I feel about revenge for something that the targets have neither committed, or can recall - given that the MC's original life no longer exists.
It'd be fine if the targets are scumbags and should be crushed anyway (the prince and magician seemed like sleaze bags), but given the circumstances of the hero always becoming the next demon king, it makes sense that they'd do what they did, and it's not something you can really blame them for.
Heck even the knight dude who didn't 'ask for forgiveness' seemed apologetic, he just couldn't bring himself to ask for forgiveness for what he was doing to MC, and the blindfolded woman didn't seem happy either.
So this series is going to have to do something to make me hate the MC's revenge targets in this timeline.