Undergrad grading is a crap shoot, especially when it comes to essays and classes grades on a curve.
Are you in Grad school? (I don’t know, I think I might have deserved this one, but yeah, it can be depending on the professor. At our school is smaller, so we are able to get to know what our professors want, very well. Either makes life easier or a living hell if you can never met the standards, because they maybe the only teaching the class ever. )