There’s a part 1 to this video that goes into it. Basically:

• videos are faked (reality level TV stuff - making the timers look like they’re still counting down)
• there was a person who was recently on staff who was a sexual deviant named Ava Kris Tyson who also seemed to be obsessed with teenagers and ran a discord server talking about inappropriate stuff (this is worse than my description sounds)
• Beast was on this server for a time but doesn’t seem to have been an active participant
• Illegal lotteries from the Streaming “giveaways”
• claiming his chocolate is “healthy” and encourage kids to eat it to have a chance at randomly winning a prize
• in Aus, having an app for the chocolate that says you win a prize when you pull the slots but you actually don’t win anything (basically getting triple 7s and getting told you win nothing)
• safety issues with the beast games, moving to Canada so no union workers can join, etc.
• this video explains some horrible stuff Mr Beast and team did for a single video

Really the biggest deal I think is the illegal lotteries. Because those are actual criminal acts