I'd guess it's a combination of several things:

First, you're not really adding anything to the overall debate (why the polls were wrong). Second, your post is mostly about politics, and how those of the party you disagree with is evil (or at least engages in ethically questionable behavior). Third, your bias is evident (Why do you doubt the left-leaning newspaper wouldn't engage in character attacks - as written, it comes off as little more than "My side is better than their side, and wouldn't resort to such tactics").

Don't stress the voting too much, though. It doesn't mean "You've done something wrong" (in general), it means "I don't want to see this kind of thing". Look at what you've posted - if you care what other people want to see - and don't write that kind of thing anymore. That, of course, depends on being able to tell what it is you've actually done.