I hate the swim team I'm on, but I am finding it very hard to quit with my parentsts and all. Please help?

Well, I go to swimming every few days and now that the school year has started, I am having a really hard time keeping up with it. Plainly said, I hate swimming on my team. I wearing a bathing suit and people looking at my scars, I hate the clicks, I hate when people steal things out of your locker, and much much more. So, how can I convince my parents that maybe I could join an easier swim team, or none at all. Please help me with this because I'm having a really REALLY hard time keeping up with my hectic schedule. Please help!