I was a bed wetter as well and while I was not yelled at for it, I was told to sleep in my brother's crib one night because my mom couldn't be bothered to change my sheets since she was sick of it
My mom scared me so much as a kid in general and I never knew what would send her into a fit of rage.
I can relate to the "stomping" thing. She did that too.
Fear tactics just do not work. I remember the fear but never what I did "wrong" and that's proof alone that it's a failed tactic!
I'm so sorry you had to go through that hell. Please just remember that you are NOT at fault and you are not helpless any longer, no matter how real and frightening it seems in that moment.
That little boy inside you needs to know he is safe. I hope that you can find peace within yourself.