I don't watch my birds all day long and I've seen my boys mate the girls a LOT more than 1-2 times a day each. ESPECIALLY when they are cockerels.
Your pullets are being abused by too many boys.
You need to remove all but one or just remove all of them.
Normal mating does not involve running off. The male lets the female know he wants to mate her and if she is willing and accepts him, she squats, he mates, she stands up and shakes and goes about her business. No screaming, no running, no feather pulling.
You have young, not quite ready for all this mating nonsense, pullets and two randy cockerels that don't care.