Is it weird to feel guilty for everything you do?

I (14F) always feel extraordinarily guilty for the most random things. I feel guilty if I don't do some high level exercises every day (ex. running, biking, cardio workouts etc...). If I quit a sport. If I don't have all A's. If I make a friend mad. If I want to quit a toxic friend group because my mental heath sucks. If I eat sugar. If I play games for longer than a few hours. If I eat snacks. All that makes me feel really guilty and I don't know why, nor how to fix it. For example, I have ski raced for most of my life, however, I haven't been enjoying skiing at all. I really want to quit because it's not fun, I have to drag myself out of the house for training, and I never really have much fun. However, I feel really bad about even having the thought. I feel like I am letting myself and the people around me down or something. I want to quit because I don't like skiing but I can't because I know I will hate myself if I do. I just want to stop feeling this way.