Could someone please explain this sentence to me
I am sick of being called "Excuse Me"
This line was said in the 8th episode of friends.
I recon this is a passive voice. And "being" is a helping verb(ing form) and "called" is main verb(third form). It is just like
I am being called "Excuse me".
But the problem is that we are using a proposition(of) in the first sentence. And propositions are being followed by noun,pronoun or gerund. for example
Sorry for being late.
I think "being" is gerund here. But in the first sentence "being" doesn't seem a gerund.
So can someone please explain the structure of first sentence and how we can use verb after a preposition.