I remember before I got married (back in 1975) my soon to be MIL told me about how my soon to be H walked out on her dinner on the table if he didn't like what she cooked & went to McDonalds.

I clued him in.....the first time he ever did that would be his last because the locks on the door would be changed & the divorce papers waitiing.....it's called boundaried & has absolutely NOTHING to do with mental illness....it has to do with mental well being!!!!!

Unfortunately he had so much other crap he brought into the marriage that I didn't get the boundaries set on.....I was finally able to escape....but it was 33 years later (20 years I hid out getting my degree & working as an engineer).....it was the last 13 that was hell