Batman v Superman: Dawn of Justice is almost legendary now for how overcomplicated it is, and a lot of that falls on the shoulders of Lex Luthor.
It’s insanely convoluted with tons of holes in it, but it makes BVS one unique movie.
Luthor likes to say he’s the smartest guy around, but complicated does not equal intelligent.
In order to get Batman and Superman to destroy each other (the reasons for which are just as complicated), Lex is revealed to in some way be responsible for almost everything that happens prior to them fighting.