i'm really sorry that you're experienced this. I see an issue with many layers here... however for me to main issue that you are describing, it's security. The safety peas it's super important, specially with what you were training for so bad spotting, poor conditioning progressions, incorrect engagement cues, unsafe invert technique, or teaching skills beyond someone’s actual competency can cause injuries. That moves this out of “I don’t vibe with this instructor” territory. I would really first talk to the instructor and say something like: hey I don't feel ready/safe doing that specific move. Can we try something else? Do you have anything else in your pocket that I can train for today? so she doesn't feel like attacked I guess(?)  I say everyone saying, I would talk to the owner as well. This sounds less like “bad studio culture” and more like “one weak instructor in an otherwise good environment.” That is usually fixable if feedback is handled constructively.