Psych meds in general contribute to the weight gain, which is advised against in PCOS. Some psych meds also cause altered glucose metabolism, also a problem for PCOS.
Depakote, specifically, is well-known to promote PCOS in young women. It is, therefore, certainly thought/argued that no young female should be placed on Depakote therapy for any reason, unless all other alternatives have been exhausted. There are suspicions that other drugs in the AED category may also be problematic in PCOS; some also list Tegretol as another problematic med for PCOS; yet, last I knew the jury was still out on Tegretol in this regard.
Yes, the diet for PCOS is quite restrictive.
My heart goes out to anyone having to deal with the many aspects of PCOS. The good news is: a well-informed gynecologist and/or endocrinologist can properly advise a lifestyle which can drastically decrease both the effects/symptoms related to PCOS!.
I also believe there are often local support groups, as well as online support forums for PCOS.
There are many excellent outcomes for women adhering to the lifestyle guidelines set forth by their physicians and/or by PCOS organizations.
Much Love