The hotel tried to dissuade me on the grounds of poor performance, saying that if I applied for labor arbitration, I would be blacklisted. How can I protect my rights?

First, if the hotel dismisses you without reason, it is illegal to terminate the labor contract, and you should be compensated financially and apply for labor arbitration;

Second, it is your legal right to apply for labor arbitration. As an ordinary civil subject, the hotel has no right to blacklist you in any industry. You can also choose the local labor inspection brigade to report.

But actually, since the hotel owner wants to persuade you to leave, there may be a reason. You can try to communicate.