Bad experiences in gyms

Saw a redditor’s comment on another thread about how he/she was punished for coming to a gym class late. I can’t imagine paying over a hundred dollars per month (at least) and rushing to class after a hectic work day only to be humiliated!

Why do certain coaches and trainers like to act like military drill instructors? Aren’t gyms supposed to safe spaces where one can exercise?

Does anyone have similarly foul PT or gym experiences to share?