" I tried to limit the info while staying truthful"
You probably can't be truthful in explaining X's actions/motives. You have a very slanted perspective of them. Leave it to him to explain himself.
As for you, quit trying to explain his actions by appealing to fog or craziness. He may well be doing what is best for him, though in not a great way. Both of you have ways in which you can improve how you deal with the world. Both of you are probably doing your best. You might not like it, but he may well be going toward the best life for him in the best way that he can. Accept it.