Worst company I've ever worked for - ESL Teacher Purple Ruler Employee Review

I was appalled at my experience of this company. I turned down roles as they highlighted it would likely be a full-time position. I spent a month training for them & then they gave me 2 shifts a week. They gave absolutely no feedback about how to improve the classes for future classes. Additionally, they will ask you 15 minutes before the class if you could start 20 minutes later and then end the last 20 minutes later (no change in pay). Most disappointing they just felt extremely unsupportive. You have to put all of you concerns in the chat with every other member of the board as well so you can't voice concerns without it being seen by everyone. I have never left a Glassdoor review before because I've had so many great experiences with teaching, but I feel as though people should be aware of how unethical this company is.