> Where as many much of the unity “shovelware” is exactly the opposite.
I think the difference of interpretation we're having is that I think you are interpreting "Unity shovelware" to mean "If it's Unity it's crap", which nobody who follows that space could easily defend (a lot of high quality well known games and publishers use Unity). But a lot of shovelware uses Unity, because it's easy to get assets for and publish with.
It's sort of like saying "Java enterprise crap-ware". I wouldn't assume that means all Java programs are crap, or that all enterprise software is crap, but that of the crappy software targeted towards the enterprise, a lot uses Java. That's not an indictment of Java, and might actually be the opposite, given that it has qualities that cover up other poor choices.
Shovelware typically does not have "appealing graphics, gameplay or sound". It is term used for low effort games and imply nothing special in all aspects.
I think supply is an issue, but I also think the author added to the problem by releasing a game that doesn’t have appealing graphics, gameplay or sound. Where as many much of the unity “shovelware” is exactly the opposite.