Sounds like PVP happened.
You rolled on a PVP server and/or flagged yourself.
You are entirely responsible for those decisions.
Do not attempt to claim it is someone else’s fault.
Enjoy your PVP content!
I have 14k hp with buffs in pvp gear. Trying to pvp in pve gear from multiple phases ago is gonna get you killed. Thankfully your honor cap is probably pretty low, so just spam until you cap each week and you can buy the good pvp gear in no time.
Sounds like the player that got you was just more skillful.