I flagrantly disagree that disbelieving someone's disability or believe someone is exaggerating because it doesn't mean their preconceived notions is something that can be helped if the culturally known depictions were specific to your wife's depictions. This is the mental health equivalent of yelling at someone in a wheelchair who can stand for short periods of time. Disbelieving someone about a disability assumes I am even capable of telling who is "really" disabled, which is an ableist belief that will not go away even if all the TikToks that say they were triggered by a minor toe stub disappeared.

In fairness, I believe that people who make jokes and light of disability suck in that I also believe this is an ableist activity. And I fully believe you that this kind of uwu-ification of disability is used as justification for ableist people to behave shittility towards your loved one.

It's not really a matter of it entirely solving the issue. As the other commenter is trying to stress, these are 2 separate issues, even if 1 underpins the other. We can and should try to solve for both. The thing is, 1 is a heck of a lot easier to solve. So why wouldn't we?

I don't think the position of "Having more accurate pop culture depictions of mental health issues and disabilities would enable better understanding from non-disabled people" is an entirely crazy one, and you haven't really made any arguments as to why we shouldn't do that.