Football is incredibly boring for me too watch. I don't find it exciting in any way because, well it simply isn't exciting, it's people kicking a ball around. There are far more exciting sports that I watch (air racing when I can, and occasionally snow sport events like downhill skiing and bob-sleigh). I also don't like how people take it too seriously, they can't seem to realise that it is really just a game and nothing more, problems arise when people can't accept this and take insults against their team as personal.
As has been mentioned before, the "patriotism" of fans is remarkably stupid. People all too often forget that they are supporting a team, not a country (and the bloody incessant carriage of England flags makes me want to punch people in the face on occasion).
So I guess my objection is that people take the sport far too seriously. The culture and hooliganism surrounding it is pathetic, and unfortunately far too many fall victim to it, like a bunch of lemmings running off a cliff if you will.