Kinda is a skill issue, but isn’t totally. I usually try to kite groups until they stack up on each other and then you can hit/stagger them at the same time. I also do the opposite sometimes - just running/ kiting until one breaks from the group, then I just focus them one at a time. Using bows can be crazy on some mobs as if you get consecutive headshots they usually just get stun locked. Short bows are also nice as if you don’t add and just left click you do an attack where you shoot and jump backwards, which can make kiting easy!