Streekg, your friend made it perfectly clear that she’s sad and has been rejected. And I truly do feel sorry for her. The question, for all of us when faced with adversity, including your friend, is what we do with our lives and ourselves as the years pass and we still face the same challenge (or nisayon, if you prefer).
It’s disturbing to see your friend wallowing in self-pity, lashing out and accusing others, and wishing misfortune on others. It’s disturbing to see her paint others with a broad brush until she rails against, not just all mothers-in-law, but the whole world (this world’s corrupt, this world’s messed up…).
We live in a beautiful world. There are many fine, kind, generous people sharing this earth with us. We need to train ourselves to see the good in others.
(I’d love to introduce your friend to the last paragraph of the Tefillah Kodem ha’Tefillah written by Rav Elimelech mi’Lizhensk. It begins with- “Aderaba, ten bilibeinu…” Try to find it for her in a Siddur; it’s found in some chassidish/ Sfard siddurim before Shachris. Avraham Fried made a beautiful song out of it, maybe you”ll find it on one of his old CD’s. (In brief – we beg HKB”H to help us see the good in others, to speak to others properly, not chas veshalom to feel or arouse any hatred towards another person, and through this to strengthen our bond with HKB”H.)
I’ve seen people go through many great hardships in life. Sometimes involving finding their zivug, and sometimes HKB”H chooses to send other nisyonos. The people I admire most, and would wish the most to be like, are the ones I see who remain steadfast. Steadfast in their Emunah, in their love of life, in their positive attitude, in their ability to smile and say a kind word to someone else while inside their own heart is broken, in their kindness to others who may seem to be more fortunate than them, in their ability to join in the simcha of others when there is so much sadness in their own lives.
Your friend also shows an astonishing level of egotistic self-glorification when she predicts that in the next generation hers will be the only children with good middos. What??!
I wish your friend Hatzlacha and a happy marriage soon. But, in my humble opinion, she needs to do a small bit of work on her own Middos before she is fit to be an akeres bayis in a solid Jewish home.