If a user holds an ice cream cone upside-down and their ice cream falls to the floor, do you blame the user for not holding their ice cream cone upright or the creator of the ice cream cone for a stupid design that allows the ice cream to so easily fall out of the ice cream holding device and onto the floor?
I find far more often that bad UX is the result of someone trying to use a tool for something it wasn't designed for. They might even clob several different tools together in an unholy abomination to get it to do what they actually want instead of having a tool built to do precisely what they want (and once that tool has been built - people will inevitably misuse it to do things other than what it was designed for and then complain about its poor UX for doing those things).
I find far more often that bad UX is the result of someone trying to use a tool for something it wasn't designed for. They might even clob several different tools together in an unholy abomination to get it to do what they actually want instead of having a tool built to do precisely what they want (and once that tool has been built - people will inevitably misuse it to do things other than what it was designed for and then complain about its poor UX for doing those things).