Musk would be much more tolerable if he followed the ancient rule of "put up or shut up"
I think he's put up.
He's done a lot, but "started with nothing" is seriously disingenuous. Additionally: you don't have to "start from nothing" for your achievements to be worthy.
Case in point: Musk calling a professional diver a pedophile for having a informed opinion based on his personal experience and expertise.
The kids were rescued, Musk had nothing additional to put up, and would have been better following the path of shut up. He was already getting a ton of praise for quick action, and got upset that not everyone universally appreciated it.
That being said I care more about Musk's real accomplishments than a few minutes of Twitter asshattery.