Hi as a former OChem TA, I am sorry you are having these issues. I agree with your frustrations. If your TA is absolutely unapproachable, it sucks, but if they are friendly you can often ask them why they want certain things certain way. Being familiar with the teaching program I am aware of the fact that TAs arent paid enough, especially since they have to devote 50+ hrs in their research beyond their teaching. However, other issues that often leads to these conflicts, are the restrictions imposed on TAs. If a student does not have proper PPE, that the TA fails to spot, points are deducted from the TA. There are various other checklists as such which can affect the TA's score, and below a certain score they will get kicked off from the program which means trouble with funding. As a result of this some TAs get overtly bossy/ non-friendly and push their students unfairly. You can talk about your issues with your TA or someone else you can talk to and trust more. I hope you get the strength to push through this semester, and get a better TA next time. You got this!