^ which is really sad because if they just let you load in, join your friends, and only have you and your friends in the world then it would've been way better. As in party specific instancing (like Division does).
But no - a level 100+ person enters your zone the enemies instantly jump from say lvl 30 to 66.... can you as a lvl 30 with a friend (or solo) kill them? yes you can. Does it make you waste a lot more ammo / time / annoyance? also yes.
I stopped playing this due to that exact problem with the game...and I am the level 100+ person and just....it's just bad.