well acne problems can go away as you age, if you are still a teenager.
changing diet to less processed things also helps clear skin.
bad body can be fixed with exercise and diet most of the time.

frizzy hair, not much you can do since its genetic, theres chemical straightening but it takes a trip to the salon and only lasts a little bit from wut i heard.

You are probably not as unattractive as you think. best you can do is try to change what you can change, and learn to live with what you cant.