why?

Chamari,
Someone once told me that you are giving away all your control if you let other people determine how you feel. Take back your control. You don't have to get angry just because someone doesn't do things your way or someone is pushy.
There are a number of great books about boundaries. Figure out what you will & will not accept. Be reasonable about that (no one is perfect!) but you don't have to be abused physically or verbally.
Then, just try to set aside time to have some fun with people. Forget about telling them what's right or what's the best way to do something or how to win or whatever. Just join in & try to follow others' lead. If others are joking around without getting hurt, do the same. If no one else is worried about being on time, or getting the best results or whatever, try out that attitude yourself for an hour or so.
Give it a try! I used to get so frustrated that no one else seemed to care as much about excellence as I did. But the thing is, they also didn't get burned out so easily, got sick less often & generally enjoyed life a lot more. And people like to be around people like that.

If that's too much to take on, maybe seeing a professional would help. Counselors can be really good about role-playing with you so you can practice the skills you want to learn in a safe environment before having to try them out in the "real world".

take care,
frances :)