I'm very sorry to hear about this and don't have much to offer except sympathy. It sounds like your ex truly has some issues.

I have definitely noticed the weather getting to me. I live in MN and the long winters here bother me much more than they used to. One of the few things I can do to preserve my sanity on a bad head day is to take brief walks in the woods outside a few times a day. It might not seem like much, but it goes a long way for me.