I’m going to chime in here and say that I think the character looks fine. I suspect it was rejected because it’s a asset tweaked for resale.
Remember that thread where you were having trouble converting a skeleton to UE and just couldn’t be helped without getting insulting? I remember. Who in their right mind rigs a character and then tries to adapt that to UE? Nobody. You couldn’t do that because you were using the auto-rigger.
I doubt Epic wanted to get into an argument with you, look at your behaviour in this thread.
My advice, whether you like it or not, is to scram and come back when you can make your own assets and act like an adult. Continuing to argue will just continue to destroy your reputation, which may follow you around forever. Show us that you know when to back down and apologise.