I'm guessing that Nathaniel has been through so much hardships and struggles that they just became used to it. And they started making other peoples life had because they think its fun or they're just bored. probably needs therapy
(Unrelated note, I am now adding this song to my playlist, its rlly good lol)
He needs weekly therapy. Mans got a lot of emotional baggage. He's used to the hardship of life by now. No level of therapy could even help him at this point. Yes, he likes to make other lives hard. He does it for fun, revenge, out of boredom, grief, and to let off some steam. He wants everyone to suffer as he did, especially since he was accused of murdering his sister. You were pretty accurate, I just added a little more background information :>
(I love this song! It's honestly a bop!)