Do all medicine residents have >80 hours a week?

How many hours do medicine residents work? Thats the branch I'm interested in. Is jt really the norm to work 90-100 hours a week as a resident in medicine or are those the rare cases? Does it get better if you get a "good" and well reputed seat?

And what do the working hours look like after 1st year, during DM and after DM once the person has finished their training?

And are all/most residences toxic in the way PGs dw treated by their seniors? Is this more common in govt/private seats?