SUPER crazy professor (PLEASE help, short and urgent!)?

I have a History course that is CRAZYYYYY! This professor failed over 50 students on their midterms, everyone agreed that the midterm wasn't fair, and that this cl isn't fair in general. I think this lady is out to fail everyone! Her exams are impossible (ie. A. Africa B. Chile C. All of the above D. None of the above, E. B & C. This lady is psycho! She doesn't have office hours because she's part time, and now we can see why! How do I tell her that I want at least a B in her cl and that I have an interest in her cl, and I worked my *** off, etc. Her finals is on Wednesday. I'm a very good student, and for me to have to say this is VERY sad. Whatever grade I get, I didn't earn it, she gave it to me, that's for sure, this semester (I'm a freshman at a community college), I have straight "As" accept this cl. Even the other smart people complain. I emailed her saying I don't want a D or F because I will have to take it over again and it will ruin my GPA. My emails are all professional, and polite. I didn't say anything about her being impossible, but save my life before it's too late! I finally understand the definition of hell thanks to this lady!