I know this may sound strange,but I want to share an interesting theory with you. As someone that suffers from Multiple Sclerosis that was caused by her family,I know that many mental illnesses are caused by family,especially by family that is so miserable that they don’t want you to exist.

When a child says he can’t sleep, you should ask him: “in whose bed (house) do you sleep?”
When a child is so stressed they can barely eat,they should be asked:”from whose hand do you eat?”
Many children can’t truly enjoy their childhoods because someone in their family can’t truly stand that they exist,a family member(traditionally the mother) tries with all of her/his strength to erase the identity of said child.
There exists a kind of unhappy person (so unhappy) that he can’t endure to see anyone enjoy anything, especially when that person enjoys things that are made available by the tyrant himself/herself. The aggressor(parent) can’t stand to see his victim(child) happy, because the victim who rejoices is perceived as free, independent, or the aggressor, who in essence is a small abandoned child, lives permanently with the fear of abandonment and lack of control over others.

In a family of this type, all roles are reversed, here’s how. In the dysfunctional family (which has schizophrenogenic potential), children are not seen by their parents as children, but as (small) surrogate partners, and later as a substitute for parents to whom they will delegate responsibility for life => (your merits they are due to me, and my mistakes are due to you). That is why children (in case of failure) do not benefit from empathy and compassion, but from the contempt of parents who see their expectations deceived.  When it comes to the parent’s needs,many times the parents will expect their children to solve their problems and in many cases the mothers will project all of their delusions-anxieties-stressors on their children(that will act as emotional sponges). Where I live(Romania)there exists a saying that a mother that is in great emotional distress should give birth to a babe to cure herself of her anxieties,in fact she will take revenge on HER parents(now grandparents) through her own children,maybe even husband.(bonus points if the relationship between the spouses is lackluster.) I’m not a native speaker of english but I hope what I say is understandable.