Fake friend, pure rat don't trust

I spawned and when to the dome complex on dam and I was breaching a container and he started to Crouch behind me told him to go away was very suspicious then he stop me with a few bullets so I ran and then he was at the other long dome and he then repeatedly threw granads and I was attempting to go the the Queen with a good loadout with trigger nades and wolfpacks I am so pissed of because I don't like killing anyone it just destroys gameplay and he needs people to kill him loads and show him what its like to die with loads of good gear. Thanks everyone for the help