Hello,
Actually you don’t understand the market Design. Please compare your product with the newest items approved in the marketplace then you itself reject your own item. I hope you will understand the market trends.
I can tell you a simple way to get accept is that your product should beat the newest product approved in the marketplace in terms of design.
Themeforest requires the design not your coding. if you fail in terms of design They will hard reject you. if you fail in the terms of coding they will soft reject you
Actions you should take
Compare your design with the newest theme approved in TF
Compare your typography with the newest theme approved in TF
I hope you will understand the marketplace 
Kind Regards
Ahshan