lots of players are very conservative in there gameplay due to the realism so its often easy to flank them and rack up a lot of kills.
I can be like that, I just got off playing a fantastic round in Zatar Wetlands (never played it before on PR). I got about 8 kills be twice flanking the same squad up on a hill.
With how easy it is to die and the longer spawn time many people lay-low, as you kinda should do