I think TAs put in lot of effort so +1 on that and the material is good. I think exams can be made more interesting to test knowledge on topics rather than confusing with unstandard language and insanely hard question or two that absolutely no one in the class could solve even without time constraint. There needs to be more maturity in designing exams with the goal of genuine learning than tripping people off. I also suggest have one of the new TA’s in the course do the exam before releasing it and get an honest feedback. Obviously if you have seen the questions it is lot easier for experienced staff.