So I was playing a private match with some friends and confirmed what some people here have complain and accused other players as cheaters.
At some point during the match I glitch out, NPCs weren’t moving, my teammates weren’t moving, the Pred wasn’t moving. I kept shooting at him until I thought he might glitched out, turns out it wasn’t him, it was me. A few seconds later I teleport somewhere else in the map and the Pred was instantly killed. All my shots actually counted, even though I was lagging and he was away from me.
So yeah, there ya go. Is a glitch due to lag, not “hackers” killing you with a single shot.