We don't actually know the situation. If he wants people to work 84 hour work weeks regularly - yeah that's a problem. I looked at it charitably. Twitter is in such bad shape the only choice is to burn out engineers in order to fix it. This points to terrible product management, which points to terrible engineering leadership, which points to a terrible C-suite. It sucks, but once you pass the point of no return you can't hire more people (they take months to ramp up), and you're gutting the low performers (they will slow you down), so unfortunately the work has to be foisted onto the rest. It's not a fun time, it will cause more people to quit, but it's also the only solution to fix a trainwreck if you notice the speeding freight train too late.