> it's not like he was killing people or selling weapons.
Well, if your standard is that no one is a bad person until they are literally murdering people or selling war machines, then no, of course not.
But as a parent myself, I think it's fair to say that if you, as a multimillionaire, stoop to doing the bare legal minimum to support the child you created, who was at one point living in poverty because you failed to support her before, then yes: you are a bad person.
There are obviously many other ways in which Steve Jobs was a bad person! He kept obtaining temporary license plates because he wanted to park in handicapped spots without getting tickets. He orchestrated a salary-fixing cartel that artificially depressed wages for many thousands of engineers in Silicon Valley, all so that he and his other obscenely rich friends could get even richer. And he had his devices manufactured in China under horrendously exploitative conditions again, so that he and his shareholders could make an extra buck. (on top of the billions they already had)
But if your standard of being a "bad person" (not even evil!) is murder or complicity in it, then you could make a strong case that Steve Jobs was not a bad person, altogether.