The face she does in panel two won't help her be believed! Nobody trusts melodrama, especially when it's on the defensive!
I still can't help feeling some sympathy for her. The last three panels have a lot of impact for me. Very well done page!
The goal isn't to make her less sympathetic... I was thinking of people I know when they talk about their mental illness when I wrote that page.
Often, they talk about stuff that the other can't relate to, sometimes get emotional because being unable to communicate something that feels important is frustrating as hell, and often end up being dismissed as drama queens.
Jean-Marie's reaction isn't even meaner than average there, he's basically telling her in person what you usually hear told behind people's back.