Marriage is never the easy skipping down the garden path that we think it will be.
And it takes 15-20 years of both people working on self-growth and on the relationship before it can become a rewarding and companionable marriage.
It is good that you went for counselling, but counseling is only as effective as the motivation for both people to work on their own issues.
You can only encourage your wife to get some personal therapy. I suspect she is clinically depressed, and this is self-caused, so the cure is a self-cure. Often it is repressed anger that the person has turned against themselves, rather than against whatever situation/person they are actually angry about.
Women who are depressed usually either overeat or the opposite .. they stop eating. They stop caring about things they usually care about, they lose interest in activities that previously pleased them. They stop doing self-care, and if the depression is severe enough, it might debilitate them to the point where the ONLY thing they can do is get out of bed once a day to pee and brush their teeth ...and then go back to bed. Before that point, hopefully, someone would have taken them into emergency for a psychiatric assessment and treatment.
But at this point, it would make more sense to MAKE her go to the doctor and search for treatments . if that is possible. Meds can help, but the major effort will be in changing what she tells herself, and that is what therapy with cognitive-behavioral therapy is about.