I'm a New Player and I Need Help...

So... I bought overwatch about a week ago and I've been playing it alot there's just one problem that being that I find myself not enjoying the game. I am frustrated playing it more than I am enjoying it. I have zero motivation to play it anymore but I want to so badly. What's wrong? Am I just frustrated because I'm not good yet? Am I just retarded? I don't know. Help.

Note: I'm constantly being put in skirmish and bad games I think I just find the game tedious now because of it I've been in at least 2 matches that have just failed because everyone left.

Other Note: I play with bastion because I'm not articulate enough to have a more complex character but Bastion just isn't fun. You just sit there. Shooting.