Windows 10 has a nice design on the surface, but once you start using it, there are a number of poor design choices and a ridiculous amount of inconsistency in the design language. This has generated a lot of criticism for Microsoft, especially from Matias Duarte, one of the heads of Google’s design team and the father of Material Design. Duarte recently took to Twitter to express how much he dislikes the operating system, not just with how it looks, but with how it operates.