From the very beginning of their comic book career, the Teenage Mutant Ninja Turtles have been largely defined by their relationships with one another. Although the Heroes in a Half Shell don't always get along, their close familial bond has been at the heart of numerous storylines over the years. This makes it that much more difficult to watch the Splinter Clan start falling apart, even if it is probably the best thing that has happened to them in a very long time.
Source:https://www.cbr.com/teenage-mutant-ninja-turtles-splinter-clan-falling-apart-idw/