If you have one job and proceed not to do it (because you're busy resigning instead of voting on the budget, say), I'd say that's a pretty thorough case of messing up the job in the first place.
Ask the Americans what it's like when your government doesn't vote on a budget. The words "government shutdown" ring a bell? In my books, that's called messing up your job.
"It doesn't matter who gets elected" is the kind of immature cynicism that Reddit and the chans have raised to an art form. It's only loosely connected with reality, and is an epic case of self-fulfilling prophecy (yes, amazingly, if you start thinking it doesn't matter whether politicians are corrupt because they all are, politicians are more likely to be corrupt. And if you start thinking your vote can never matter, you won't vote and therefore it definitely won't matter). It's a failed fantasy of a political philosophy, the ramblings of people who never got out of their "woe is me, I am so misunderstood" phase.