Still not explaining how it's 'sad'. Honestly the fact that you're stating these things as static facts that will never change (even though we as a country are much more liberal than we were even recently and Bernie has younger voters tied up) is what's coming across as sad.
So Bernie doesn't win, he's strengthened ideas that years ago would've been completely ignored, forced Clinton to absorb some of them as her own. It's not about Bernie, he loses, he returns to the senate for a while, he retires, the ideas stay. Michigan is just one brick in that.