Guild Wars 2

So @4:58 AM pacific time on may 31st 2015, I had a PvP match where a certain user deliberately stayed in the base, and then taunted everyone in chat in a deliberate attempt to make our team lose. He was not AFK, and he enjoyed making our team lose.

This was also not this certain users first offense at deliberate sabotage.

So I ask,
Why is there no report function for this?

There is, it’s called harassment.