Why So Many Regenerations Dislike Each Other In Doctor Who

The Doctor has been through several different regenerations in Doctor Who, but for some reason, the different incarnations of the Time Lord very rarely get along with each other. Almost every time The Doctor comes across another version of himself (which happens more often than most would expect), the interaction quickly becomes hostile as the pair insult each other and make fun of their respective regenerations. It’s something that always causes plenty of laughs in the show, but it can also be quite confusing considering that they’re technically the same person.