The first Suicide Squad. By the time the 2nd had come out, I’d sworn off DC movies altogether.
The only one I mourn is Joker (though not as sad about that because part deux has horrible reviews).
Joker and Shazam were good. Theo other stuff post Justice League either I haven’t seen or wasn’t good, beyond the second Suicide Squad ofc. (I did like Birds Of Prey but I admit that was a bad movie)
Joker 2 was great even though it was a pretty big step down from the first movie, but only I and Nando V Movies think that.