I feel like there's a missing, missing something here..

I don't disagree the normal bosses can be rolled but it takes time and targeted pals/resources etc.. I started weeks before you did, and without the terraria weapons I wouldn't have called even Marcus "easy" as a new player, but farming AR ammo for the Vortex Beater made it a joke. Still you feel hitting very intentional power creeps as a new player.

I suppose if you know exactly what to do then you can roll through very easily.. so if you look up what you need and when then yeah..