I never have this problem myself (PS4 player) and it sounds crazy!
Usually when I see a radscorpion, it digs in the ground and then pops up behind me but I make short work of it with Daddy Sledge. Daddy Sledge packs a punch with a stun pack so it can't move and when I take on 4 or more of those bastards (very hard mode) I have a blast!
Its also fun to sneak up on them with grenades lol not right up on them of course but with my PA's targeting HUD and them shimmering red, I can see them from a mile away! One deliciously well planted grenade later, ragdoll physics and flying radscorpions lol