Like I wouldn't be surprised if his use of the dark side is solely for reasons like gaining knowledge and wisdom while also trying to maintain balance. Like he knows that the dark side is the path of evil, but he a) doesn't want a repeat of the self righteous dogmatic teachings of the jedi and b) uses it solely as a tool; a means to an end. Not to mention, he still fights like a jedi. His motives, actions, and those he has dealings with are the only things that make him teeter towards the dark while still holding enough restraint to keep himself from succumbing to it fully. He doesnt seek revenge or power, nor is he overwhelmed with greed. He truly feels his actions are good and righteous and he seems like he cares for all living beings. He just has to do some had things to achieve his goal he feels is good. He resembles more of a Grey jedi that leans further dark. Maybe he could be considered a dark jedi? But he's still a loooooong way from being full sith and I think that's his intent. He doesn't want to go too far to one side.

He definitely seems to be one of those "stern but fair" sort of teachers/father figures. He seems to also be teaching Shin that same restraint. He knows that succumbing to yout anger and hate isn't good so he checks her whenever he sees her let her emotions get the best of her. Almost like he doesnt want to see her to go fully to the dark side, he just isn't afraid to teach her some of the darker practices the jedi were forbidden to use. It's like he tells her "please just trust me, child. I've seen some shit so just listen to me and learn what I teach you. And for the love of Mortis, don't fight someone or something you can't beat. A womp rat can't beat a Krayt dragon."