MVVM设计感觉太笨重了，我做错了吗？

I've recently started creating a WPF application, and am just hoping that someone can confirm to me that I'm building my overall system architecture properly, or correct me if I'm heading off in the wrong direction somewhere. Especially since I'm trying to do MVVM, there are a lot of layers involved, and I'm not sure I'm doing things properly.I've recently started creating a WPF applicatio