Any advice for making it through a shitty semester?

Only two of my classes are tolerable, I kind of actively hate the other three. Two of the professors are generally apathetic and ineffectual; the other is a good teacher (and I actually loved her class at first!) but she's such an unbelievably draconian grader that she has sucked all of the joy out of everything. I have passed the point of insecurity/anxiety about not doing better (I have no grade lower than a B, but that's kind of ridiculous given how much effort I've put into a lot of my assignments) and have now entered the entirely apathetic "no fucks left to give" stage.

It's not helping that I have to take 3 classes over the summer (6 days a week! It should be criminal!) because my advisor gave me some shitty and wrong advice about scheduling— so there's really no end in sight. Ugh. Screw college.