Corporate Democrats of all stripes - POC, women, not old, calm demeanor, not a socialist - have ruined the ideals that people like FDR (as flawed as he was) vigorously fought for. Many leading Democrats today stand for little else than “don’t rock the boat; and what big money fundraiser am I scheduled for tonight?”
Senator Sanders is the only viable one running for president who hasn’t. I base my vote on policy and history. If a two headed chicken had the track record and policies that Bernie has I would vote for that chicken.
Conversely, if someone said “M4A is nuts!” a few years ago but now somehow they love it (just to pick one thing) - it’s a problem.