Seriously.. Have any of you fought an adult version of a mutant?
I can link you a video.. I'm not saying I do immense damage or am the best or have shit loads of HP, but I still usually do a lot more damage than what I can muster on a grown up mutant raccoon.
Since the last update creatures in general seem a whole lot harder but mutants are pretty dangerous now and require a group not anything you will solo kill.