Ryan went into the debate with Biden to do one thing: apologize in some manner for the 47% comment that Romney made because the GOPe were wetting their pants that independents might be offended. So Ryan went into the debate looking for the opening he needed from Biden to address the 47% comment which meant he wasn't responding the way he should to Biden, and once he got that opening, Ryan was done and Biden finished walking all over him.
Of course they threw that 2012 election, just like the Black Sox threw the 1919 World Series.