Terrible TAs

Sorry for the rant- does anyone know if we can report terrible TAs? I've never had a quarter where a class that had such simple content was on average graded so harshly. The rubrics are so unclear- you could either get all or nothing for a short answer question with no comment as to why you lost that many points. When I attend office hours they spend a long time on each question trying to find something to justify the point deduction, only to realize that I had the same answer as students who received full credit. The professor doesn't seem to care and entrusts it all to the TAs who try their hardest making concepts as difficult to learn as possible. I'm all for receiving a worse grade when I didn't understand the content, but I'm so frustrated when there's so much variability and uncertainty without any explanation for it.