Yah Regi is a dick, that isn't something new. But guess what, he owns the team and he has yet to make a move roster wise that hasn't improved his team. TRM to dyrus, Chaox to wildturtle, himself to Bjergsen. All upgrades and smart moves that weren't made just because Regi was mad at someone. Its also pretty telling that turtle has said exactly zero good things about Xpecial since all this started, whereas other members of TSM have either on stream or twitter.
edit:
Can't find the link, but there is a screen capture of Dyrus talking about the benching and how when a botlane doesn't mesh or like each other it just can't work. Seems pretty obvious that whether or not Xpecial and regi were still butting heads that he also wasn't performing his job as a support in synching up with his adc.