Agreed, Crystal City is a terrible choice if you are trying to attract talent in the DMV. Who wants to make that commute? Not sure why they didn't choose Dulles - more space, new metro infrastructure, Dulles airport access and existing AWS offices and data centers.
Well, there is no good commute in the DMV for one, but Dulles/Herndon/Tysons at least has new metro stops and more highway infrastructure than to Crystal City. Plus, Google, Oracle, Microsoft, AWS, et al are all already off the Dulles toll road. If you are in tech, there is a high probability you are headed out that direction anyway.