Some where jerks, mostly they were young and had no clue what they were getting into. Some were just plain taken advantage of.
Marriages to foreigners are very difficult. One of the biggest things your spouse will have to deal with is the isolation. They will know no one in their new home. They have little money and no social safety net if things go bad. They often there speak English but are not aware of the pop culture references in day to day life. They know the words but not the meaning.
My wife is chinese. She speaks passable english and has an average job. She is so great, she cooks and cleans and well you know what else and doesn’t talk much. She never asks about my feelings, and i can play as much golf and watch footballs games and drink beer and she just brings more. I am the luckiest guy in the world.