No third party voters in ANY
of the "blue" states (save Florida) would have added enough votes to Romney for to take the state. Florida is still in flux. But even if it were to go for Romney it won't take him to the needed 270 electoral votes.
Hover over any of the states at the above link to the results, and you'll see that his loss was by such a huge margin, that all the "other" votes wouldn't have come close to helping.
More likely, a bunch of "conservative" or "independent" voters didn't bother turning out, being so fed up with the corrupt 2 party system, that they no longer care. Your anger would be better focused there than at members here.