The thing is that calling them crazy might make sense the first weeks, when you are still hurt. But after a few weeks, it pays to look at things from their perspective to learn and move on. Some break ups are no ones fault. I mean, two people can be incompatible and that's it.

For example, a vegan might find difficult to live with a hunter who likes to eat raw meat.

But if after so much time of breaking up you still hold resentment and aren't over the break up, then you might find more difficult to find new partners, because that resentment is carried to the next relationship.

I can speak for others, but when I was single I actively avoided men who weren't over their exes and calling them "crazy" was one of the telling things that they weren't over them. Just saying. Why any one want to be the next "crazy" in your list?

Maybe finding someone is about finding the "right kind of crazy" for you. For me has worked.