I need to ask a semi rhetorical question... why for the love of ferenginar has time travel obliterated sci fi recently?
It used to just be an occasional offshoot episode or part of a seasonal finale for some shows, but jeez the amount of shows (including this one) that just revolves around it is ridiculous now.
I can’t help but watch them knowing full well the whole story is ridiculous, in bated self loathing.
The reason why most shows stay away from time travel, is it's almost impossible to do without breaking a ton of other stuff in your canon. If like STD, you don't care about canon or being consistent, it's an easy do-over, a chance to reset and retcon any stuff you don't like and just wave your hands about to not-bother explaining it.
Possibly Babylon 5 managed it by sending one of it's characters into the past to become part of the historical record that we already knew about, but even Doctor Who (a show about a time traveller with a time machine) rarely messes with their own timeline because of the problems that it causes in consistency.
In summary, time travel breaks a load of things, but it's easy for lazy writers who can't be bothered to tie up the loose ends.