I agree! The fact that Czech Republic sent awful entries is not the only reason they did poorly.
Whether they're bad or good, Central European countries seem to always fail. Unlike Czech Republic, Slovakia tried hard to show its culture or comply with viewers'/juries' bad taste for anything Western-sounding : one intricate-structured powerful ballad in 2009, an ethnic uptempo song in 2010, a standard Americanized ballad in 2011 and a rock song in 2012... I mean in 4 years, they tried very different types of music, yet they didn't manage to qualify.
No wonder Slovakia withdrew. We'll see if Poland can achieve a good result this year.