He uses the term 'self-care' as a reference to his claims of struggling with his mental health. He uses his mental health as a shield against criticism and a way to get easy sympathy from the people who still support him. Yet another reminder to those people: he's using your sympathy to collect money from you.
So, what precipitated this mental health crisis that he continues to use to further his grift? His wife wouldn't agree to an open marriage, which he considered "a mind fuck." This, from the guy who was paying prostitutes for sex for years. Who had been caught multiple times sexting girls. Who admitted to infidelity because he wanted sex because his wife couldn't satisfy him. All of that? Not a mind fuck. His wife objecting to more of the same under the heading of "open marriage"? Mind fuck.
In other words: "mental health struggle" and "self-care" are euphemisms for "selfish asshole and terrible human being."