There's a lot of diaspora from Something Awful, and I unfortunately include myself in that. I signed up for the place before the paywall went up, in 2000, while goofing off in a high school Java programming class. I never was too deeply involved, but there's a LOT of people online who were.
Lowtax was always a troubled guy. Most of the people involved in trolling-as-subculture were, even early on. He suffered from depression and substance abuse, and it got worse and worse as the people around him (most of whom weren't in much better or worse shape) just shrugged it off. Going from that it comes as little surprise that the domestic abuse allegations were ignored for years until the site administration's disagreements with him came to a head over the last 3-4 years; suddenly after that it was all considered plausible.
An unimaginable number of people hate his guts, some for good reason (i.e. his exes, people he screwed over IRL) and some for petty reasons (i.e. people he banned from his own website). They're all currently united in dancing on his grave, both in the memorial thread on SA, and all over Twitter, where most of SA's top posting talent migrated starting in 2010. It all seems kinda gross and abusive, but that's almost fitting. In a messed-up way.