Most brokers did not allow you to short because there were no shorts to borrow for that trade. This is common for stocks in high demand for shorts, especially o

Most brokers did not allow you to short because there were no shorts to borrow for that trade. This is common for stocks in high demand for shorts, especially one that is 140% borrowed. Unless you're a professional trader and have access to the best brokers, you couldn't short GME even if you wanted to (this is common, and why professionals pay big $ to have access to high demand shorts).