Guild Wars 2

I just saw this video from current WvW situation where relatively small group (guardians?) burn everyone and everything. :-)
And not me but author of that video named it massive bug…
Is it something about buff sharing between people or related to OP burning?
https://www.youtube.com/watch?v=NVWMfHu_dWw

Last year when I played ESO they did some “balancing” and things like one Dark Knight player with vampirism solo killing 30+ enemies become possible:
https://www.youtube.com/watch?v=jyZsIDSSGV4
Many players including me quit Eso after that. (last nail in the coffin)

Hero points could be earned quite fast…
I started only few days ago and yesterday at lvl 70 with only 65% map completed I could already train everything.
Now I have 67 unused points and never even visited map higher than for lvl 50-60 as I am doing it all from bottom up. (now on 17th map – Iron Marches)