Batman vs Superman
DC tried to copy MARVEL and made its own version of Civil War and at the same time introduced a new face for Batman.
1
Justice League by Joss Whedon
Introducing so many new characters like Aquaman, Cyborg, Flash and not giving enough time to each character to become familiar with the audience.
2
Suicide Squad
Same mistake as Justice League by introducing new characters and on top of it Joker by Jared Leto was ruined.
3
Was nothing like its previous movie , and brought back Steve Trevor from the dead without giving much of an explanation .
4
Every other movie released by DC was concluded by a post credit scene like MARVEL , with a cameo of Superman just to make the hype but not working on it.