Think its arrowverse fatigue really, everything is pretty much finished I believe... Flash last season next, Arrow, Supergirl, Legends of tommorow, batman all cancelled now or finished already.
I think superman and lois is great though and done right so far. Stargirl is decent well it has potential, Titans and doompatrol are excellent. Naomi so far is very bleak but it might have some potential being set on an alternative multiverse earth.
I would like to see the whole DC verse rebooted and tv shows connected more with the DC movie-multiverse.