Submitted my first product and got hard reject, just want tips on how I can improve

Hello, I recently uploaded my first product to Themeforest and got hard rejected. Im curious to know your opinions on how I can improve going forward so the next product I upload, its high quality and meets the standards of Themeforest.

Here’s a link to my html email template - (https://demo-pulse-template.netlify.app/)

It’s too basic.

It would be very easy to find a free file similar to this online and if you look at the popular items already for sale you will see the diversity, multiple demos, coding for different clients etc, that you have to compete with.

One example from a decade ago but still offers huge versatility Koble | Mailchimp Business Email Template Sets by nutzumi | ThemeForest