Themeforest HTML Template Submission Rejected

Hello. my HTML Template was hard rejected with a reason it isn’t at the quality standard required to move forward. I would be thankful if someone could suggest me on how to make my theme a quality standard for themeforest.

Here is the demo link for the theme:
http://ellefsonthemes.atsnx.com/?i=1

Hi,

I have see your item.
Its my personal opinion that your item isn’t ready for themeforest.
Main reason is your item design quality. lots of better design are already exist on Envato > Themeforest market.Now Envato Themeforest are accepting more unique design.
Try to improve your item design quality hope your item will approved.

Thanks!

Also w3c validator reporting many errors in code: https://validator.w3.org/nu/?doc=http%3A%2F%2Fellefsonthemes.atsnx.com%2Findex-main.html

In HTML category this is important.