Besides physically harming the other, there are no deal breakers in my marriage. We took vows, we said forever. I didn't say "til death do us part or one of us screw up". I find it sickening that nobody takes their vows seriously these days. You made a commitment to be with that person for the rest of your life. How are you supposed to teach your children the value of your word, if you don't follow through. There is always a way to work through your marital issues, and throwing in
The towel and getting a divorce shows you are weak, selfish, and not willing or are too lazy to put in the work.
Sorry if anyone is offended, bit that is just how I feel personally.