Mate, I am sorry to say but it’s nonsense. I don’t see any actual ripping off anything. It’s called the risk of designing multipurpose generic themes. You and the other author alike are using design concepts widely available these days and if I go back before your theme was released, I’m sure I can find some circle portfolios that I could accuse you of “ripping off”.
To me it doesn’t look like a rip. Just a usage of the “same-old, same-old”.
PS: Also not really sure the “name calling” is okay on forums. You should have taken this up with Envato Support.