system
A chat on subreddit /r/wallstreetbets
human
During the GameStop debacle Robinhood removed the ability to buy or sell GameStop stock, preventing the ability for the average person to trade in a stock that was actively harming the 1%

I'm sure there's more to it than that, but that's what turned me off of Robinhood.
gpt
they just removed the buy button, not the sell ;)