No one can give you a correct tip or suggestion unless you mention what exactly is the ad disapproval reason as shown within the Google Ads account interface (you need to be logged into the Google Ads account to know that). Find out why an ad was by looking at the "Status" column.
Landing page ? Even due to landing page, there are still one of various reasons that is shown in the "Status" column .... You need to mention THAT reason which is shown the "Status" column, so that others may be able to guide you as per their knowledge and experiences.
"Circumventing Systems" is a reason shown for account suspension and not for ad disapproval.
No offence intended, but I am always so surprised when lots of people post their issues without providing even the basic information required to have an idea. This shows lack of skills to have an "eye for details". Such people employ the similar "lack of eye for details" in creating their landing pages and creating their campaigns as well and then they remain clueless about why their ad is disapproved or why account got suspended !!!
Even more surprising is people replying without an OP even providing the very basic information required in order to have a correct understanding of the issue. The same lack of basic understanding people employ in their account creations, campaigns, etc and then they remain clueless about any issues occuring.