I hate myself and everything I have done in the past...What's wrong with me?

This is first of all perfectly natural, its something everyone goes through, me included. Self-love is a difficult thing, but in my experience I've seen that one of the greatest ways to practice is through regarding your future self as a friend, for example, at night I will take out a few minutes to take care of my skin knowing that future me (which is consider separate for myself) will appreciate it. were often hard on ourselves but super kind to our friends, so regard your future self as someone else and doing a favor for a friend instead of yourself. regarding the past thing, the past is exactly that the past, it doesn't define the you of today, every day is a new page in life, you can rewrite and start fresh, so don't worry my friend

There is nothing wrong with you, sweetie! It's what depression does. I also feel so guilty for things I've done in the past, even if I know I shouldn't. But you have to remember, it is going to get better one day. There are people who will and do care and you will find them one day. I know this message is cheesy and stupid but I just want to show that I would care. I do care and so do so many other people here, do not be afraid to talk your mind. You are strong and you will survive this.

This sounds like depression; hatred of yourself or extreme guilt of the past is a very common symptom. I would recommend, if this continues, to use the resources on 7Cups or lookup nearby support for depression.

There's nothing wrong with you. Everyone does mistakes and choices that we regret. That doesn't mean somethings wrong with you. I have done some stupid things too. You are unique and you are like you are for a reason. You have a destiny to achieve. You're perfectly imperfect the way you are. I know it may be hard to not doubt yourself, to love yourself or to just accept the choices and decisions you made in the past. But they are in the past and you can't change them. They are part of you who are and who you will be. There will be so many more decisions to make in the future and I can promise you that you will for sure regret some of them later in life. But that's okay. You either learn from it or make the best out of it. don't be so hard on yourself. Sometimes we are forgetful and forget that the only one that will stay with us to the very last day is our self and we need to respect us more.