How do you know if you’re in a dysfunctional relationship?

Question to man: what behavior/words from ladies that trigger a negative emotion for you?
Question to lady: what behavior/words make you wanna break up the relationship?
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Isn’t it quite normal that during some point in your relationship, you feel hurt, lose trust, walking on eggshells, generate negative emotion when talking? How long will you tolerate those negative interactions with your partner? When is time to break up assuming you have young kids together.
How do you know if you’re in a dysfunctional relationship?
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