Review Detail of BooboboBoa in Avatar The Last Airbender: Not Avatar

Honestly, a lot of the plot points are utter garbage. Just feels like the characters do whatever the author wants them to, which I mean is cool and all, but when the character randomly changes motivations, it's a little weird. For example, the mc's whole family died cuz of some firebenders, so he goes on a killing spree. That's fine. He meets up with the avatar and a little while afterwards, kills a bunch more people. The avatar tried stopping him, mc gets knocked out. Alright cool, that's fine. But shortly after waking up, this man changes moods and stops hating on firebenders. Meets up with ty Lee, Azula and then just FUCKING JOINS THEM. In the recent chapter as I'm writing this, he's lighting up the dai li. This is after killing sokka btw, which was weird already cuz he knew the guy. About the Azula thing, the author hasn't really written anything about this but he's like putting hints that the mc is gonna take over the royal family and stuff, and that's fine, but why does he have to make this whole convoluted plot to gain power. Lastly, why is the mc's power level fluctuating so much? Like hell be fine fighting against ten people, but then randomly he'll just start losing. Last of the last, why does he keep either making up these elaborate background or over explaining his actual origin?