I have been watching some of this guy's conversations. At first, I expected to find a typical nasty and bad faith (((twitterer))). Surprisingly, I didn't detect malice in the guy. He appears to be upset when someone is being disingenuous with him.
Instead, I think MrGirl is committed to radical individualism and radical honesty. Normal people hide, repress or sublimate the nastier parts of themselves. MrGirl is willing to expose any part of himself, however despicable, due to his commitment to these principles. For instance, he objects to monogamous relationships "fucking awful" because they limit individual freedom.
Obviously, he's very odd. But I don't think he's driven by a twisted sense of resentment. He expresses what he thinks clearly and logically so he can run rings around any youtuber commentator. He does not shy away from confrontation or condemnation if he believes what he says is true. I think he is the embodiment of many 60s ideas taken to their logical ends: complete removal of any social or moral barriers to be your authentic self. He's an individualist extremist.
But it's rationality and self-expression without ethical tissue. Or the ethics are atomized liberal nonsense. He's dangerous.
Maybe I am completely off the mark or I am naive because I haven't encountered this kind of lolcow before.