I like your post, but it reads more like you don't get/don't like Verhoeven, than it sounds like youre describing an objective problem with his narratives. Showgirls is one of his best movies, all the things you describe about it in the negative, is where Verhoeven's commentary actually lives. It isnt the artists job to only show people the art they understand.
In a thread about what is the deeper meaning that people miss, criticizing Verhoeven on this basis stands out because without Verhoeven, Robo Cop Starship Troopers, Basic Instinct all get made, and they suck. Theres no deeper meaning to them at all. Nobody else could have told ST story quite that way. Verhoeven read the satire into the scripts, and was telling stories nobody else was even capable of telling in Hollywood. ST didn't work with American audiences, because Americans fall for fascism, thats the point. the same guy who wrote/conceived RoboCop and ST 1 also wrote the garbage ST sequels. Verhoeven read his own experiences living under Nazis into ST using satire.
Criticizing Showgirls because it doesn't follow a formula for satire doesn't quite land because Showgirls is a metacritique of formulas. "Las Vegas doesn't work like that" because the movie is about Hollywood. It was critically panned because it showed a mirror to the industry. By creating a glamorous Hollywood musical in the tradition of An American in Paris, My Fair Lady, and Singing' in the Rain (itself a meta-satire, albeit a warmhearted one); but taking on the form of Skin-emax movie, bad sex scenes included, Verhoeven's message was clear. But no one who makes these movies wanted that message to be received by audiences.