Being married to someone who constantly criticizes you, abuses you in any way, cheats on you, lies to you, and makes you feel like nothing you do is good enough, will certainly not allow a person to feel good about themselves or what they have to offer. When a man or woman gets out of that nightmare marriage, and is truly loved and appreciated in their new relationship, they become the best person they can be. Genuine love changes you for the better, and it is hard for an ex to accept that.