I was single from age 43-46. I dated a lot in this demographic.
These are (collectively) the least appealing females on the planet, and unless you get really, really lucky you should NEVER EVEN CONSIDER marrying one.
I think a sweeping generalization based on bitterness is unappealing, but maybe that's just me.
Sorry your experience was bad. But not all of us in that age group are. Just as I know not all men in my age group are 35 year old 18 year olds looking to get drunk and laid every weekend-— still live with their parents.