I was hit regularly with a wooden spoon until I was in my teens. While this is a common 'weapon of choice' for exasperated parents and a lot of people I know were hit with this (and worse, sticks and belts) I still feel it did me harm. Bruises would be left, and I remember feeling deep shame. My parents would also say I deserved it because I was a 'difficult' child. I did grow up feeling that I was a bad person.
So although I wasn't hit to the point of cuts and severe bruises, on me slapping had a bad psychological effect. But my parents are decent people and honestly seemed to believe this was the only way to get me to do what they wanted, although it was clear that my mother just lost control of her anger on occasion and laid into me. However, I am unable to hold it against them. And as I said, where and when I grew up, it was a common enough experience.
I would never hit a child (if I had one) though, as I know it DOES have a long-term negative psychological effect. Ok, maybe I'd slap a toddler lightly on the hand for trying to stick thier finger into a light socket, but nothing more than that. Physical violence terrifies me.
OP, what you are describing is SERIOUS abuse. Your father beat you until you bled and were marked, and knocked you unconscious. I hope you feel completely validated by what you have read here. I would also advise you to seek counselling, as soon as possible. There will likely be long-term psychological effects on you, as you have already mentioned.
(((hugs)))