I believe no rules were broken here, instead you yourself broke 3.3 as realistically those numerous bat hits would have rendered you motionless. You instead decided to keep on walking whilst being hit and even open the car door. You should not attack someone if you don't intend to cause harm. You were a threat to this man with the baseball bat and he responded once you physically assaulted him.
As for killing you when you lagged out, there is no rules against that. Whilst it is unfortunate, it is simply your fault that you lagged out at a pretty bad time. He was justified in killing you judging by the fact you'd assaulted him earlier and had returned with a firearm on your back attempting to follow him in to his shop. Whilst he could've called the police, the fact that you were so close behind him meant it would not have been plausible.
tl;dr AR is invalid, you broke 3.3