DC doesn’t give anything outside the Justice League any love, and brands every possible team w. the JLA name.
A bunch of characters on a space adventure? Justice League Odyssey.
A magical storyline? Justice League Dark.
The Titans will on again off again get the spotlight, but they’re in a league of their own no pun intended, and they have a built in Batman connection w. Dick.
And yeah, that Batman connection.
Harley Quinn shoehorned into Birds of Prey was panned by fans.
Batman founded the Outsiders yeah, but not every new Outsiders book needs to have him in it, or be ninety percent the Batfamily, but every new book is a combination of those two things.
Look at the current Outsiders book; Fans have repeatedly pointed out the story was better suited to The Terrifics, but DC went the way of the Bat.
DC doesn’t trust its own product.