If a person shows you who they are, believe them the first time. Women often start justifying men's rude behavior: he had a difficult childhood or failed relationships. We all have a past where we received wounds and accumulated fears. However, this doesn't mean that we should put ourselves in a situation where we become a receptacle for others to spit into. A difficult past doesn't give us the right to speak rudely to others or treat them with negligence. People will treat you based on the standards you set for yourself.
In society, there are many traumatized individuals because too many women turn a blind eye to rude behavior and don't end bad relationships. So, they pass the message to men, brothers, and children that such treatment of women is normal. If a sufficient number of women said, "Enough!" and walked away, it would force men to put more effort into their relationships.
Everyone wants to be in close, loving relationships. It's encoded in us.
Studies show that one of the criteria for being happy in marriage is maintaining high standards. This means that people don't settle for nonsense but strive to become better companions to each other.
So, when you meet a man, take your time, hold your ground until you get to know him better. A man who wants you will be very purposeful. As Tanel Padar sings, "Look around a bit, it's not too late, you'll have time to live a little more."
More about
3 month rule here.