Simon: It's still staggering that someone who relied on his online reputation for 100% of his income had so little regard for it
I think it's a lack of self-awareness. He really isn't capable of seeing things from the point of view of someone outside of his situation. His hard-charging, take-no-prisoners style of operating can work over a short period of time, and it did for him. He grew his channel and protected it by going after anyone who criticized him, and he was relentless. And he also alienated people who were on his side because he demands unconditional support. So, when he finally stumbled badly, he lacked a support network- the people who could have helped him were on the other side of all of those burned bridges.
Even now, he won't give an inch and continues to turn on people who supported him. You have to wonder how many of the ones that are left -the real diehard supporters- will end up in his doghouse because they couldn't keep navigating the minefield that is his massive and fragile ego.