P1 stealing support weapons

This has happened a few times to me, so I thought it best to discuss it. The power Player one has in a game is crazy. I have had happen a few times where I died and p1 stole my stuff. So I ask for it back and he ignores me. I ask 5 more times. I melee him as a warning. he kills me. I shoot him back to get my gun back. he kicks me. There is no winning if your p1 has no decency or morals. Also, he was not in a sticky situation when he took it. he swapped his weapon but kept the ammo pack so I couldn't use his weapon if I wanted to. If you are like this out there, stop. Am I overreacting?

EDIT: Yes, this WAS on SUPER HELLDIVE, but this guy is still stupid.