<human>: Hello,

So both of us are currently taking an AP Physics class. 

It's quite challenging and no one in the class, including the top of our class, actually understands what's going on. 

So in a group chat involving this friend of mine I ask if anyone is considering dropping down for an easier level. 

My friend says "wtf no why would you do that"

I said because I feel like the class is very hard and that no one is going to drop it because they're too proud. 

She instantly shoots back that "this is how AP classes are" and "this is how college works yknow"

Now, my friend has experience with ONE AP Class, a biology class. In this class, which was graded on a curve, you were typically curved up 2 letter grades, and then got a half letter grade back in "test corrections", and then you got a letter grade bonus to your GPA. My other friend who took it never passed a single test and got a high B in the class. 

This is not how my AP Physics class works at all. Resenting being talked down to, I said something along the lines of "well I don't think this is like AP Bio. That teacher curved you guys pretty generously and that's not how this class is going to work."

She quickly replies back, saying that they passed the exam and that's real life, and then said that since the tests were so hard you were expected to get a C and that's why it was curved. 

I was pretty angry that she was trying to justify this as real life. I replied "I think real life means if you get a C on the test, it's a C for the class."

She texts back, "don't talk to me anymore," and promptly removes herself from every group chat I'm in. 

Perhaps I was a bit harsh but I was annoyed at being talked down to. 

I'm just kinda confused here. was I really that bad? My friends all admit that's how the class worked. What do I even do? I'm kinda stunned that this whole thing happened.

Can you condense the text into a few key points?
<bot>: A friend of mine and I got into an argument over a class she took and now she's suddenly super mad at me.