My brother an ex YG trainee.

When the YG audition was held in the US, my brother decided to audition, since he has a good voice and is a great popping dancer. He was accepted along with  with 3 other good talents, and had to move to Korea to begin his training.

He was a trainee for a good 2 years and a half but he had just dropped recently for so many reasons. 
YG is not the nicest company he said. They bash and bash and bash you then expect for you to do good. 
And by what he told us Yang Hyun Suk is very mean. He tells his trainee that if they’re not capable of doing anything perfect the door is very near for you. 

And he also calls his trainees who don’t dance well pigs and fat. 

I asked him if there were any rumours or secrets  about the idols company and he said that every rumour trainees whisper were either true or some kind of true, they weren’t “fake” or “false” 

*This is from my brother’s past trainee days, I nor does he know if it’s 100% true*

2NE1:
Dara is so nice she usually comes and greets the trainees and to cheer them up, he says that she’s not thinking of dating anyone so don’t expect a wedding for her anytime soon. 
Yang Hyun Suk is delaying 2NE1’s comeback on purpose, he says the more they’re late the more views they’d gain on their new comeback. 
CL may seem nice, but she actually is not. When the trainees greet her she doesn’t even smile she ignores them and go. Her face is glued on the cellphone, my brother says that he hears from the girl trainees that she’s dating someone but don’t know who.
Bom is an attention seeker, whenever something is highlighted on her she does anything to keep it going. She is nice though and very funny. 
Minzy’s parents tell her to stop doing the butt shaking since it’s bringing shame to her parents.

Big Bang: 
He never met any members of big bang except for Seungri. 
Seungri loves to flirt with girls. When he goes to see how the girl trainees are doing he praises them for their slim bodies or long hair. And the sex scandal was not true he wan’t in Japan whe it was reported. 
Daesung is really close to Girls Generation’s Yuri, he texts her everyday, and she’s the number one girl on his list for partying bit they keep it as a secret.
G-Dragon can’t stay a month without dating,  Japanese women turn him on. He thinks of himself as the money maker of Big Bang. Without him BB would be nowhere. Sex is his favourite meal on breakfast. 
Taeyang is forced to do those ugly hairdos. Yang Hyun Suk always says he’s an african american so he must act like one.
TOP is a cry baby, he is also very lonely. He was on depression pills before. He thinks he has no friends so he preferred to stay alone. His parents don’t call him. They say he’s taken away with fame so why would they call a son who’s famous. Daesung always keeps him enlightened that people want them and he gives him a good laugh. 
If Big Bang were not the money makers of YG they’d be disband a lot of years ago. They were going to disband  before the Tonight era.

Lee Hi: 
Yang Hyun Suk is just happy Lee Hi is doing better than 15&. He hates Park Jin Young. And does everything to wipe out his success. 
And he’s telling Lee Hi not to be bubbly and laughing a lot because he thinks it’s really bad for her reputation and singing career. So he’s forcing her on another personlity so different from hers.

That’s all he told me.