Why do the giants suck num nums?

first of all the giants suck really bad and so do the cowboys right now (yes im a cowboy fan) we have one of the best defenses in the league but give up too many big plays (pat watkins rookie) and our dumb o-line wouldnt even start in college levels and last monday night when romo was playing the giants prooved that they are not a good team...let me tell you why.The dallas qbs threw 5 ints and were sacked at least 7 times including a safety on dallas. then dallas had horrible play calling no running game and only caused on turnover (terence newman) and the cowboys were still in the game up until the last int that went for a touchdown...now that tells me that the cowboys would have smacked the giants if we wouldnt have done all of those stupid things....we stayed with the giants untill the end and yes the offficials did screw up sometimes...on the interception by the d-linemen he was holding julius jones on a screen (holding on the defense)