I think that Tesla have done a lot to increase EV adoption and SpaceX have done amazing stuff in space. Musk is a very successful businessman, but I can still detest him as a person for several reasons. There's his support for extremist politicians and activists, his sexism and racism, his attitude to his trans daughter, the car crash that was 'DOGE' which is likely to cause massive death and suffering. Of course some will like him for those and others are getting rich from his business dealings.
I have no idea if he is happy. I've heard he works hard, but seems to spend a lot of time tweeting. I guess you can say he's driven.
I despise Trump for similar reasons and it's interesting how the two of them have fallen out. Maybe it's just a clash of massive egos. Labels like 'fascist' may not be helpful if you are into strict definitions, but there are some nasty and powerful people in this world when we need more hope.
I think that much wealth can screw you up. Bill Gates is pretty flawed, but seems to be trying to do some good. He gets abuse for that from some. It just feels like some of the mega-rich are just accumulating wealth and maybe it's so they can abandon this planet for the rest of us to deal with.
I got off Twtr and am unlikely to buy a Tesla, but I doubt Musk will care.