Mnozzi, my daughter goes to Michigan and has had 1 TA so far. She is only a junior, so maybe senior year, she will have more.
She has had math professors that don't speak English well. I have heard this complaint from students at many schools. I agree this isn't a good thing.
There seems to be a belief that the higher the average SAT score at a school, the better the learning environment. I don't believe this. The better learning environment is the school that you enjoy going to and where you can do well.
You can also learn plenty from people with lower SAT scores than you. They may even be smarter than you in many areas.
"I always think about what my father's partner's wife, who is a MI graduate, told my brother when he was looking at schools. I went to MI and became a physical therapist, if I would have gone to a smaller more elite school, I would be a doctor. These types of comments are said more often then you think."
When people don't reach their dreams they like to put the blame elsewhere. Sometimes the answer is in a mirror.
Good luck with your college choice. There are many fine schools out there.