Anyone elses job just makes them kinda wanna die and like you’re less than nothing or just me lmao

My boss seems to hate me. Sees every mistake. Ignored ever positive and gas openly mocked/reprimanded me in front of coworkers. “Gee Ummah, do you even know your job cuz I notice Sally does all the work” I do the work I'm assigned, that single task was assigned to Sally. But no matter how much good I do I'm put down and compared to Sally. Am I even worth anything Why are we employed