Unfortunately the account deactivation story is quite poor. Under Settings > Account Information > Deactivate Account you're just sent to a customer service email form. They say it takes 1-3 business days to process. As a side note, you have to close out all of your positions and transfer out all of your money before you're allowed to close the account. This seems unusual to me from experiences with other brokers. Fr…
Robinhood does allow you to transfer holdings directly to another brokerage (for a $75 fee). https://robinhood.com/us/en/support/articles/transfer-stocks...
I can't find a history that shows when they added this, but it appears they at least added transfers in a few years ago:
https://www.reddit.com/r/RobinHood/comments/6tre6o/transfer_...