I am a rogue. I have solo'd multiple Warbringers ~10ish without help. It takes a while, but it isn't hard so long as you don't mess up interrupting the fear.
Today I had just started soloing a warbringer in Jade Forrest when a group of three players come up and wanted to kill it. They begin to tell me "you can't solo this lol", "Just die! you can't solo", "Lol just die you're throwing knifes and it is going to take all day", etc. They then proceed to run around me on their mounts trying to distract me and mess with my head. It works and I screw up the fear and die. I get my body and reply, "I've solo'd many of these /shrug".
I moved on to the Dread Wastes (which is the easiest due to flat laying ground and Klaxxi buffs), I kill it and then PM the guy "just solo'd the one in DW /shrug". He responds that I was being selfish and anti-social by soloing and I should have invited them. I responded that I couldn't as I was in battle and you cannot invite people that are in a group. I then told him that even had I reset the warbringer and invited them, they likely just would have tagged the mob and not invited me or accepted group. I then let him know he could have invited me and I would have accepted, but instead he chose to grief me. Calls me a basket case and the convo ends.
I then go to Karasang and find the Warbringer up. I engage it and as I do they show up. Again, they start messing with me waiting for me to screw it up. I screw it up twice with 2M health left, but manage to get the retag so essentially solo'd it 3 times due to evades or resets. I never get an invite from them, which I would have taken, but they message me during the fight "lol, you are still killing it?" Sure it took a while but I killed it.
Is it a douchebag move to solo the warbringers?