TBH You can add any nationality, and yet your statement will be correct - ripped off by _______ women. Majority of Thai families I've come across and observed lead normal lives as any other.
Too many stories of knives being used, assaults, police involvement and similar to list here. - in any country, people getting involved with this type of behavior are the exception.
The issue is, all women working in the bar atmosphere, we cannot say are the normal. Most foreigners find their mates in the bars, as that is the quickest and easiest. So, having trouble later on is nothing unusual, IMHO.
In general, I've found Thai people (compared to some foreigners) to be exceptionally tolerant and very courteous. It always will depend whom you associate with.
Generalizing all Thai women is not right.