Guild Wars 2

I am a ranger Lvl80 for a while now and I never had a problem in WvW. I am able to do 1v1 and 1v2.

Maybe some people are playing builds that don’t fits their play style?
Undergear?
Static during a fight?
Unlucky and fought against very good players?

Did you try to go pass a group of mobs without fighting? If it is the case then it is all your fault. You aggroed 5 mobs of the same type (the same skills).

I did it once with the Earth Elemental (cripple spam) and since than I never go through a group without a fight.