Strangely your wish will actually happen one day. I know that the majority of people don't believe in the continuation of consciousness, but after dying, there is a period called life review, and during this period, you re-experience your whole life, from birth to death, from another person's perspective.
I know a guy who used to beat people up, in fact he was a professional hitman of sort, I think in the military, he died during a lightning strike and had to re-experience all the things he did and said but feeling every blow from the other person's perspective.
He even experienced it down to third and fourth level, as someone went home and their wife could see what happened to her husband all beaten up by him, he even experienced the emotions of the wife of the guy he beat up, her shame, sorrow, etc.
Anyway, many people say these are hallucinations but why would anyone hallucinate their entire life from the other person's perspective, including all the emotional and physical pain.
I know it is hard to believe but you wish for will happen.
On a positive note, nobody will judge you, the life review is not about judgement, although you might judge yourself, but that's it.
The solution to your issue is not more self hate but self love. Being beaten up will not cause more self love, therefore it will not make anything better. What you want is useless and will not improve anything for you.
It would be more useful to spend 5 minutes each day telling yourself that you forgive yourself and love yourself.
Louise Hay has some really good meditations on Youtube that focuses on forgiving yourself, any traumas, your parents. You would get much more out of spending 5 minutes a day with that than any beat up