You're fucking sick. Also literally the very first episode he murdered someone that he thought was a law enforcement officer, for the "crime" of calling him stupid. Then a few episodes later he murders an entire FBI detachment. Then the FBI leader's GF b/c she was about to discover who he was. He's blatantly the villain and an irredeemably evil one, from the very start. He kills any who so much as insult him and even the times he kills criminals, they're mostly already in jail and not a threat to anyone. Plus, Japan in particular is notorious for forcing confessions from suspects so a lot of the people in jail are likely innocent.
Death note spoilers he destroyed those who impeded on his divine mission. In a world that seems godless he was given the right to be one. I did not cry when he died or anything though.