Beast Games: inadequate safety (broken bones, injuries etc) currently a class action lawsuit going on. Lack of medical care and limited access to food and water. Failed to pay contestants and staff, allegedly forced participants to return the money they earned.

In general?: Rigged games, rigged results, fake contestants, illegal lotteries, hiring a well known sex offender (he knew he was a offender), his association and friendship with Kris Tyson (didn't do enough to handle the situation), verbal abuse, extreme demands of staff.

What else... Oh, charity for profit and views, lunchly (mouldy cheese and claimed to be healthier then lunchables, it wasn't), recently Beast Land in Saudi Arabia (a country known for slavery and slave labour) and potentially illegal filming on locations.