Hating and completely disconnecting from every single ex every time you break up.
There are times it absolutely makes sense to cut off a toxic ex, but I have a friend who is one of the best friends I could ever ask for, he also happens to be someone I dated for a couple of years when we were young. People think this is weird, but I would move mountains for this man because he is so kind and supportive. His girlfriend is also amazing and she has fantastic taste in music/sports/everything. My partner and I have gone on double dates with them and I always try to hang out with them when I am in town.
Sometimes you find a person who fits in your life perfectly, just not in a romantic way. And sometimes you only figure that out after being romantically involved.
That said, I do have a few ex’s who can eat shit lol