I agree that it is one of the most underrated games out there. The issue (that a few have already pointed out) is the theme just doesn't resonate as much with some people. I honestly believe that if you changed nothing other than the art and turned it into Mad Max, we would be talking game of the year.
The pandemic has also hurt it via closures of locations, shows, and as a result...word of mouth. A lot of people simply haven't been able to play it.