He's taken many too many blows to the head. Listen to interviews with him early in his career and compare them to his interviews now. The level of brain damage he's endured is pretty obvious.
Honestly, he hasn't fought much in the last 8 years. His decline is 90% from alcohol and cocaine. His talent and work ethic was incredible during his rise, but after the Mayweather fight in 2017 he couldn't resist the Scarface lifestyle he had dreamed about. It's a sad story, not because he's a good person (he's not) but because he went from this athletic anomaly to a scared, weak, delusional has-been. Truly a literary tragedy.
Well, he certainly would be whether he realised it or not - if by that you mean easily manipulated by outside interests (like musk and god knows who else)
I think Musk is another puppet when it comes to X (SpaceX, Tesla and Neuralink not necessarily IMO). It's interesting how the message of both is "I'll make world easier by reducing number of people and processes". And it seems such language gets following