Not sure if it was on this thread or one of the others, but AprilArcus said something of Clinton to the effect that his self-confidence was way out of his proportion to any reason for self-confidence. You could say pretty much the same for Angus. The only way in which he's above-average is his almost painful averageness. If he were a size, he'd be extra-medium. I mean, think about it; he's average looking, seems to be of more-or-less average intelligence, his wit (supposedly his meal ticket) ain't anything to set the world on fire, his emotional intelligence kicks in from time to time but is offset by an assholeish lack of awareness, whether about his own actions or their consequences on others.
Nobody's perfect, either IRL or in fiction, so it'd be silly to expect perfection from him or anybody else. But compare him to pretty much everybody else in-comic besides, say, Penelope. Each one of them is a hot mess in some respect, but they also have something -- a skill or talent that sets them apart, or at least makes them bearable. Marten's indecisive as hell, but is a good friend and confidant, and could probably do something with his music if he had the confidence to pull it off. Faye's slowly getting the confidence back to get into her sculpture. Raven, bless her ditzy self, has intellectual gifts that are at odds with her image. Sven's a lothario that you wouldn't want within a country mile of your daughter, but writes mega hits practically without trying, in much the same way that even Jimbo manages to crank out bestsellers even though we only ever seem to see him on the verge of weeping into his yellow beer in dive bars. Try as I might, I can't see anything similar for Angus. Sure, we're told he's witty, but we haven't seen it.
Maybe it's just me, but if this is a signal that we'll be seeing less of him, I don't particularly mind. He's like that person you're secretly not happy with your friend dating; they're marginally okay as long as they keep your friend happy, but once they stop doing that, you don't have much use for them. Given that he's been as much of an ass as he's being to Faye (barring some unforeseen development or otherwise out-of-character epiphany), he can tell his story walking.