Yeah, funnily enough I felt Pratchett grew more and more frustrated with the world as time went on, just he found a more constructive way to depict it. Characters like Vimes, Moist, and Vetenari are deeply flawed humans who manage to nonetheless be the best they can and to aid the world as they are. Tiffany Aching is who he wants the world to have more of and meant to serve as a role model especially for his daughter, but for all young people, to encourage thinking and caring and to value the hard labor of taking care of those that other’s don’t.