I was an asshole here, edited but you are being mean.

Which five of these traits do you think are easy to handle in a spouse?

1. Inflated self-esteem or a grandiose sense of self-importance or superiority
2. Craving admiration
3. Exploitative relationships (i.e., manipulation)
4. Little to no empathy
5. Identity is easily disturbed (i.e., can’t handle criticism)
6. Lack of attachment and intimacy
7. Feelings of depression or emptiness when not validated
8. A sense of entitlement
9. Can feel like others are envious of them, or may envy others

Getting symptoms under control is a necessary component of people with certain mental illnesses avoiding doing harm to those particularly close to them, especially romantic partners. The entirety of the cluster B is this way.

Now if their partner has gotten their symptoms under control but they're still mad they had them at all or that they have to keep doing the work, then I'll say you've got a point.