Kudos for landing a better job. I guess you were quite young at the time and I hope you matured more than to put yourself in such a harmful situation again.
If you deem that something is senseless, impossible or on the verge of abusing you must say so and stand your ground. It is the right thing to do not just for you but for your coworkers and the larger ecosystem you are moving about. It's what that general said about 'The standard you walk past, is the standard you accept' only this time it was about the standard you put up with.
All the best