Games Practice 3 (My First)

Due to circumstances out of my control, I was unable to attend the first two practices. Last night was the first practice to which I have gone. I threw basketball relay for 30 minutes straight last night and my arms are now paying the price. It hurts to extend them.
I have a lot of areas that need work. Apparently, I slap the ball, my bounce passes aren't as accurate as I would like them to be, I need to get the ball out of my hands faster, and get a better jump out of the triangle.
I was not to impressed with the people there. There were some I thought were awful that surprised me by being adequate and some I assumed were good at basketball that were not quite there.
I am having a hard time with this thing. I know I am significantly better than just about everyone at AWANA when it comes to athletics and games and that sort of thing. Its not that I try to brag about it, I am sincerely trying not to do so. However, I am easily frustrated at the incompetencies of others and I often times let it show. I have two options, quit trying or start screaming. If I quit trying, it helps me to relax a little bit more, I don't feel angry at people because I am doing my part and they are messing it up, and I am able to shrug it off when somebody messes up. But when I do this I come across as a jerk who doesn't care. If I start to get angry, obvious what happens there, everyone and their moms (QUITE LITERALLY) get angry at me.

I'm not sure if I need patience because I sincerely doubt that waiting for people to stop messing up is going to help me. I guess I need peace to just deal with it without getting upset.