AITA

Some friends and I were running a bunch of raids the other day when I accidentally blacked out my friends legs in a fire fight, which then got him killed. In my defense the last things he said were “my gun jammed I need help”. Since this was happening behind cover I couldn’t see the guy, all I knew is that he had a shotgun. I swing the corner and see a guy standing in the open pushing the area where the gun fight is happening and I hip fire 3 bullets and they happen to hit his legs. He then gets killed by shotgun man, I kill the guy then go to try and insurance fraud the loot. I die while trying to hide it. Friend is really mad so I try to be the nice guy and bring him a kitted mk16 into the next raid for him with good ammo. I bring in my nice svd sniper and a decent kit. Everything goes back to normal and we load into next raid, friend proceeds to mute/deafen himself in discord and team kills me and makes out with all my insured stuff. Including the stuff I gave him. I understand I messed up and shot his legs, but was that needed?