With respect his combination of stock assets and some basic text is never going to work.
Look at this St. Patricksday poster example as a working example where @flyerlicious is creating the different background and assets manually - that is premium design and what you need to be striving for.
At the very least all elements of your designs need to be properly editable and not just static stock photos
In this example also your typography is way off too - font choices, lack of hierarchy, inconsistent alignment etc.
Thank you very much to mention my design as an example.
The big difference is that when you left the model out of the download nothing left but just some text and this is not premium.
So make your own premium content like i do and maybe your flyers will be accepted.