I don’t understand why people wouldn’t take it at face value without any further context offered to them beforehand. It’s a campy action film that’s a lot of fun but with just the faintest dusting of authoritarianism that could be easily disregarded as just part of the ambience of the filmmaker’s decisions. It ends on a hopeful scene implying better understanding of the Bugs in order to reach victory.
You’ve got to read the book to get it, but even then that doesn’t really shift the film out of being a Big Action Shooter that’s fun to watch.