Thanks, not much expertise there.
Given the amount of money you are putting along with weekly youtube videos, I suspect you are fighting against some top players in that space.
I think you are probably getting many clicks but they are not converting.
SEO is one side to get clicks, other side is adding heavy google analytics / fine grained events to analyze traffic funnels - specially paid clicks to understand where yu are losing.
Some of the users could be useless people - with low buy intent / accidentally landed that you can try to omit out of google ads,
Some might have the buy intent but got turned off somewhere on your site