Yes he did. Sanders was an establishment tool the whole time. It's astounding how well it worked, too. People wanted to believe, so they did.

Remember how Hillary cheated him out of the nomination in 2016? And then he endorsed her then, too?

There's a great video where Jimmy Dore figures out that Bernie is a sellout, I spent 10 minutes just now trying to find it, here's the best I could do. https://www.youtube.com/watch?v=n6dFvqqjK6Y

In the real one he's visibly crushed as his hero has just confirmed his worst nightmare.