If you click through to the sources PDF, you'll find "The percentage of all births to unmarried women was 40.0% in 2021, down 1% from 2020 (40.5%)". The number is trending down. Is this still grim?
All children know they have a father and a mother. Not living with one of the parents leads to psychological issues such as the feeling of abandonment. There plenty of studies showing that children with a parent who has passed away have less psychological burden than children living with one parent - losing a parent to death has been common in our history, so, it's something that we're adapted to. Divorce or not having a parent is a relatively new phenomenon.
I've heard that back in Soviet Russia, single moms lied to their children that their father has died in the WWII.
It depends how you define "hell". You need to look at things of perspective and the self-replicating reproduction without the safety framework of a traditional family.