Not quite. He shared some blocklists that had a disproportionate amount of trans women during Gamergate. The grudge remained, his Mastodon account received a lot of reports, and the admin of the instance he chose decided that he doesn't want to deal with that drama. Wil fully acknowledged that, and decided to stop using social media altogether.
Also, there's no such thing as "not liberal enough". People on the far left aren't liberal — they don't believe in capitalism in the first place. Liberals are more center-left according to US standards, and center-right according to European standards. Further to the left are socialists, communists, and anarchists, not "super-liberals".
From what I recall, Wil created two accounts on two different instances without vetting either of them. The first account was on an instance run by a member of the same blocklist "friend group" that caused the Gamergate problems, so it wasn't just an old grudge, but an old wound reopened.
The second instance was a non-US-based instance that looked like mastodon.social but was not (IIRC, the instance was Japanese run and moderated?), and the instance moderators had moderation trouble exacerbated by English not being their first language and moderation not being their full time jobs.
I feel like Wil could have been successful on Mastodon had he found (or founded) an instance better aligned with his interests and moderation needs in mind (maybe even mastodon.social). Part of the problem of the whole debacle was that learning that any way but the hard way was likely next to impossible for someone like Wil, because Federation is complicated and hard enough to explain to technical people, much less someone with so many complicated moderation/community needs by nature of being a "celebrity" to begin with.
(I still sometimes hope that someone like Wil would make the right technical connections to learn everything they need to know in order to thrive in the Fediverse and have joked that I would be happy to be such a guide if I were asked.)
Also, there's no such thing as "not liberal enough". People on the far left aren't liberal — they don't believe in capitalism in the first place. Liberals are more center-left according to US standards, and center-right according to European standards. Further to the left are socialists, communists, and anarchists, not "super-liberals".