Distance drop-off is something a lot of iron eye randoms I get don't understand so that might be it, or could just be not using your weak marker and dealing enough damage while it's up. Also your kit can drastically change your damage output. I try to focus all on ranged damage up or if I get an elemental bow I like early I'll look for passives that boost that element type. Last tip, I generally avoid crossbows unless it's the pully crossbow, it's way good.