If you didn't like the movie, you didn't like it. I did think it was great though. But something critics might find interesting. I remember listening to the DVD commentary back in the early 2000s (I don't recall if this was the original DVD commentary or a re-issue) and it became very clear to me because the commentary was Voerhoven and the screenwriter, that they both did think they were making different movies. I got the sense that the screenwriter was earnest in his attempts to portray the conflict in the book (he mentions at one point how the bugs are a good stand in for something as evil as the Third Reich for example: wording might have been different, but that sort of sentiment was expressed). And it was clear Voehoven felt the complete opposite. This is one of the reasons why I think I like the film (I think that split worked). However it would also be something that might go to your point here. I should say I listened to this commentary once in like 2002, so do take my synopsis with a grain of salt, it is possible I am misremembering details). And I haven't followed the screenwriter, so no idea if he later clarified or reframed his opinion.
Again, the whole point of great satire is that not only will some people not get it, it should actively anger some portion of the audience.
The reason that
Starship Troopers works so well for some people is because it is such a brilliant satire of the appeal of the fascist militarist state. The actors chosen were chosen not because of their great acting abilities, but because they embodied that classic look that you would find in, inter alia, a Reifenstahl propaganda piece. Bugs are, of course, the ultimate example of "othering," such that even the existence of a "smart bug," is nothing more than a pressure point on the enemy,
That's why it works on so many levels. Much like
Common Sense, one person can easily point to certain parts and think that it is so over-the-top that of course it is so obvious that the meaning cannot possibly be missed (NPH and his uniform, for example). On the other hand, Verhoeven's earnest use of the tropes of action movies and the audience's desire to sympathize with, and engage with, the protagonists of the story can both confuse the audience's expected expectations (can this really be a satire) while at the same time providing the most effective critique of the appeal of its target- the easy seduction of militarism and fascist tropes.
So with that in mind, by taking the ideas in Heinlein's book and extending them to their conclusions, he offers the most effective take on them possible. The problem with those ideas is not that people will necessarily recognize them as bad; it's that that they won't, and instead be seduced by the easy images and appeals to the emotion. For people who found Heinlein's book to be something good, of course this take on the source material- which is necessarily and fundamentally a critique of the ideas within it, to be distressing and unpleasant.