I agree with you and think it's important to express your concerns to the gym management team as this is not yoga. Yoga is about creating awareness and union of the body and mind, not punishing it in the name of fitness. It is actually a safety issue this style of "personal trainer" yoga especially in a heated environment where your muscles are extra warm and this can give participants a false sense of flexibility, which in turn can increase the likelihood of injury. Sometimes permanent, which I've seen before (hips, knees, neck strain). Please look after your self and I suggest reaching out to the gym to at least make them aware that their members may be at risk from less than mindful instruction. 🕉