To answer the question OP, the only thing I don't really like about Musk specifically, is what I think is some visible display of hypocrisy and double standards...
If he get's twitter, then he is the greatest tweeter the world has ever seen, if he doesn't then it's a bot-ridden cesspit of spam and shit posting.
If he get's access to the Hadron Collider then 'his' technological prowess meant he was entitled to be in such big leagues of technology all along and you shouldn't have even batted an eyelid about it, if he doesn't then it's 'demonic technology unlike which the world has never seen' brace yourselves...
If someone accepts his invitation to use his submarine to save kids stranded in a cave then it's case in point that he does and only ever has been striving to make the world a better place through his technology, if the guy refuses then he's obviously a paedo for even being in Thailand in the first place...
That's the way i'm seeing it anyway. I mean for all the talk about people being jealous of him, he clearly does seem to often have some case of 'crab-bucket' mentality himself.
Also for the record, I think that 'paedo guy' what ever his name was, was wrong for slapping him in the face like that. Pure disrespect but i'll use it for the sake of context here because I can't be bothered digging up some other examples that didn't spring to mind.