It does sound like he absorbed some of his toxicity from the community. It's definitely a self-inflicted wound, but it does sound as if he was handed a gun and had it pointed directly at his foot.

That won't be solved by fixing the community, which is an enormous boat that won't turn around any time soon. But it's hopefully a lesson to other people putting themselves in a similar position. The community also contains a lot of people pointing out the footgun.