Huh, I have no idea what he's like in person, of course, but I didn't get a bitter/angry vibe from that article at all. It's filled with the kind of wry self-mockery and exclamation points that signal, to me, good humor.
Take, for example, the photo caption that exclaims:
Bedrocks are wicked aero!
Of course they're not, and of course he doesn't think they are, but the point is that he doesn't care--not about his own lack of aerodynamics or about roadies' excess of it. The bitter version of that caption would have said something self-righteous about roadies' obsessive pursuit of vanishingly marginal aero gains. Instead, he simply turns his gaze facetiously on himself.
Or this:
Yer a sandal guy now. People just give you free weed.
I mean, come on.
Finally:
So that's where I’m at currently. From a hardline XstraightedgeX roadie, to a puffing woolen clad plus size foot model on a fat tyred bike with handlebars jacked up to the moon. It's a slippery slope that is lubed in extra virgin coconut oil.
If "plus size foot model" and "handlebars jacked up to the moon" and "lubed in extra virgin coconut oil" don't signal a lighthearted sense of laughing at oneself rather than a caustic rejection of everyone else, then I'm not nearly jaded enough--and don't want to be.