My gods. This op sounds just like my spouse and i. He has good days, a week or two at most, then suddenly behaves kind of in a malignant narcissist, childish way, making life miserable for everyone. Refuses to see a Dr even for an injury he needs to have attended before it causes permanent damage, and is about the laziest person I've ever known which leaves me burned out and not wanting to do anything because I'm the only one who keeps cooking and washing etc. It's so infuriating. But i feel too damaged to survive alone with kids so you know. I stay in misery instead. He constantly gambles and denies everyone else if nice things to pay for it.
Sorry. I know this isn't about me. Just feeling like someone can relate and needing to vent a little