Re. Elon's behaviour. There;'s definitely something odd about how Twitter affects certain people. I've seen friends be driven mad by it, as in become different people. Sam Harris for his failings saw it happening to himself and bailed. It's very strange.
Harris mentions this epiphany, when he realised he'd blocked 50k people, and wondered what had happened to him that he had become someone that blocked 50k people. He's not alone in this, but most people never take the step into self-awareness.