Then you're not a true fan. Look at my avatar; don't you think I know the Browns suck? Of course. But would I rather play as the Steelers, Ravens, or Patriots, just because they're good? Hell no. I'm a Browns fan, thru and thru, no matter what.
The best part of video gaming is it's a fantasy world, where (quoting Kevin Garnett) "anything's possible!!!!!"
Heck, I took the Browns to the Super Bowl in Madden 08 last gen just by releasing/signing players I thought would benefit
my team. (I lost to Dallas, but still.....)
That's the whole point, IMO. Take my fave team, and see if I can do better than the real life owner and GM.