Ehh it's pretty bog standard genre silliness. Read or watch any comic book media and 99% of the time the main villains plans are stupidly complicated, require a billion little things going right, need unfeasible amounts of resources or just break the laws of reality in some other goofy way.

>>714855704
1 - 3: Cause he wanted to have fun killing a bunch of kids
4 - 5: Cause he wanted to save his child(ren)
6 - Beyond: Cause he wanted to have fun killing a bunch of kids