How can I make my cat stop attacking me ALL OF THE TIME?

My cat is a boy and is ALWAYS attacking me. I can t let him sleep in my bed with me or be in the same room as me for too long because then he will randomly starting attacking me hard. When he attacks me he either leaps into the air and sinks his claws to my body along with his teeth. Or he will bite my hand, lie on his back, and kick my arm simultaneously with his feet. I have an array of scars all over my arms from him. I ve tried to play with him even more than I usually do and I ve bought him toy after toy, but he still seems to be PISSED at me for no reason. I got him from the shelter when he was barely two months old and he is now going on two years old. I think he might have been taken from his mother at the shelter too early because on those rare nights where he does sleep in my bed, he kneels one of my pillows and sucks on it, then falls asleep peacefully. I do usually leave him alone all day while I am at school but I always feed him before I leave with wet food and as soon as I get home I give him dry food and he has multiple bowls of water around the house. Why is he so mad at me? Why does he want to attack me all of the time? Sometimes he will meow at my door, after I have just kicked him out of my room from viciously attacking me, and I will let him in only for him to attack me once again.