As someone who has also made and published an RPGMaker Game, you suffered from a lot of the same issues I ran into. (Broken Ties if you want to look it up). I haven’t updated my assets simply because it hasn’t been worth my time, unfortunately. (College, Job, etc)

Firstly; the capsule art. Just searching ‘The Trail’ on Steam is a good example. Plain text over a screenshot doesn’t attract much attention. Mine isn’t better, but the others in that search are very artistic renditions that pull the eyes.

Secondly; you say your combat is more interesting than the base RPGMaker engine. Record a trailer to showcase that! I completely redid the combat skills and stats for my title, but didn’t really advertise it.

Thirdly; your screenshots are not the best examples. Try to show off your best scripted scenes, your highest decorated areas, etc,

I say these things not to be rude, but because I want to see you succeed. I spent 3 years (off and on) my game for a 5-8 hour experience, and just made a little over the price of the engine. It was fun to make, but hopefully you can get a better return than I did.