wtf is wrong with beatbox?

I swear, those drinks are dangerous and will easily kill you drink less than you normally do.

Drinking 6 made me hungover for almost 24 hours. Drinking nine over the course 9 hours even almost killed me the next day, I had to get someone to come over to IV fluids since I would rather die than go to the hospital again.

I know it sounds like I drank a lot but I can easily drink 12-13 glasses of wine in a day without any hangover.

Is it the sugar they put in beatbox that makes it so horrible, or are they putting some sort of awful additive? I just have a hard time believing sugar alone can do this to the body.