Wouldn't she be stressed out though if she stayed in this floristry course, where her instructor continues to berate her for being late or something else?

I guess I'm about setting limits with people. Even instructors. If they won't accommodate, and are being jerks, they need to be held accountable and if that means losing a student enrolled b/c they are assholes then so be it.

Being late twice to a 6 week course is nothing. Black roses is being gaslighted by her floristry instructor, most likely because the instructor has a very strong personality and black roses being late twice, triggered the instructor to overreact. I don't know. I just would drop the course and find another one. This instructor sounds like a pain in the ***.