I hope this doesn't come across mean spirited, because it really isn't intended to be. Simply an observation. If it comes across differently, I apologize in advance.
It sounds as if you don't have an established Fargo when you say "I'm terrible, probably 550-575". Is that right? I'm also guessing that you don't play a lot of tournaments pool with people that do have established Fargo ratings or you would have one yourself.
I think people who don't play in a lot of Fargo events with others with well established ratings, especially if they spend a lot of time on the Internet

, have a misconception of how good a 575 Fargo player is. Maybe it's my own misperception because that's right where I am, but a 575 Fargo gets around the table in a pretty sporty way. Does he miss shots? Miss position? Certainly. But not nearly as often as people might think and he's fully capable of running back to back racks and making you pay for any mistakes you might make along the way.
As has been mentioned before, attend some of the higher dollar 600 and under tournaments, Hell pony up your thousand dollars and jump into that box yourself, and you might come away with a different perspective of what "terrible" is and is not...