I'm making a movie and I have 7 main characters and about 12 enemies/badguys/antagonists.
I don't know if this is a good way to do it.. or should I reduce the number of main characters.

The movie is animation and I'm not a professional movie maker. Just hobbiest

Only one antagonist, the next ones are usually "deflectors" (the antaonists friend/assistant) but the protagonist may never know the deflectors until the deflector does something bad to the protagonist while he/she is busy trying to defeat the antagonist. Sometimes the real Antagonist may also be a deflector and the antagonist the prtaginist thought dies and only then the real antagonist may reveal themselves near the end in the last showdown/battle between the true antagonist and protagonist.

The protagonists ally (the ally character/protaginists friend) sometimes gets involved with these deflectors too, unfortunately sometimes even dies.

There can and must only be two oponents: PROTAGONIST and ANTAGONIST. And only one can win (usually the Protagonist) otherwise your story can potentially become too confusing for readers/viewers. Think of the others as deflectors ;)