We did not know either. I can think of a thousand reasons someone could be cut(academics, disruptive behavior, drugs, etc…) but being injured while playing and then cut midseason is a new one to us.I'm so sorry that your daughter has to deal with this BS! I honestly didn't realize that you could be kicked off the team mid season!
Sadly, I could have written your story myself, albeit a different school!! This type of behavior is atrocious! The same thing happened with my DD as well ... College soccer is not for the weak, that's for sure. My daughter learned what a wolf in sheep's clothing is like, and has learned exactly what she DOESN'T want moving forward. She ended up landing herself a great coach with morals and values that align more with her own. I hope your daughter finds the same.
My daughter has definitely learned what she will value when the recruiting process opens back up. People and relationships over school name and conference.