I believe you are in the UK so maybe treatment is available, so not getting help and not staying on meds is not ok. I believe the woman has a disability and when you marry a person with a disability or when your partner develops a disability, you just have to learn to cope.

What do you think would become of this woman if she did not have her partner's support?

Yes, you can blame her.

Yes, you can refuse to help her if she won't help herself.

In the end, it will be a bad end if everyone abandons her.

TEK