I'd say it is less about being a mess and more about the fact that there are 1000 projects that do state management in totally different ways and it is nearly impossible to figure out which one to use. Even if you pick one, you don't find out that it has some critical bug until you're half way through your project and it is too late to swap it out. So, you end up coming up with some hacky workaround that creates a lot of brittle code and breaks every time you upgrade some other non-related component of your application.
