Maybe not "underrated" but "Jobs only did marketing, Woz did all the technical work" is a very persistent comment I see on the internet when he's brought up.
Not to discount Jobs as a person, but the narrative in 100 years could easily be "Jobs was in the right place at the right time when technology reached a miniaturization threshold such that a computer could be in every person's pocket, the first time in human history; and Jobs led the first company to be there at the right time and capitalize."
But Jobs is who made the boxes something that non-nerds wanted to have in their homes. There were dozens of computer companies at the time, some (not many, but some) of which had Woz-level engineers (e.g. Jay Miner and team at Atari). But only Apple survived.
Someone once said there would never have been an Apple if there had been only one Steve, and I agree.
Was he a jerk sometimes? Yeah, definitely. But he's not the first genius who's been a jerk. At the extreme, Isaac Newton was a horrible person.