I was regrettably bought this for Xmas. I got through about 30 pages and had enough. He's not without wit and as you can see where you're expected to laugh but nothing generates much more than a vague internal sigh. The whole angry man thing is terribly trite and I've seen it done better. It would be much funnier if he focussed on the impotence of his rage - but there's very little honest self-deprecation in it. Despite vaguely sending up his privileged life, the digs are all skin deep and he's still essentially attempting to paint himself as the big-man. The back-handed self-compliments, the implicit vanity and the self-obsession, especially of the first chapter, are all quite grating.
Fundamentally I've no empathy for the protagonist: the guy's a bit of a tit.