For starters, Terry Francona had a great regular season as manager of the Indians. He did a great job getting his team ready for each postseason series. He did a lot of things well. However, he might have also cost the Indians their best chance by his bullpen management in Game 4.
Joe Maddon is widely regarded as one of the best managers in baseball. He almost cost his team the series with his bullpen management in Game 6. These two very intelligent managers were both working on the same philosophy. It backfired in spectacular ways. I don't necessarily fault them for it; new things have to be tried from time to time.