Fireteam Damage

Does someone want to explain to me how I took 80% of my health in damage, two times, in the same match, vs one of the fireteam members by himself and another situation where it was a 1v2? They didn’t even use knives or parry, it was straight up guns that took my HP down 80% within literally a second or two. Are players really starting to hack at the moment, or did they just get really lucky sniper shots on my head that did that much damage? It was insane.

Sniper/shotgun to head, probably also breaking your facemask. The hit and break will do around half dmg to a zerker IME