well, if you think about what these companies are known for, then it's like this:
SM: has best idol singers in the industry ( no other Kpop company has such good Idol vocalists as SM, their music style and concepts are very old , boring and uninteresting, but that's another story).
YG : here we must also admit that YG produces the best content in the whole Kpop. high quality Pur.
their content is never old, boring. stylistically (I mean music style too) best company. they produce timeless content.
the MVs of 2NE1 and Big bang from 10 years ago are stylistically still the best in kpop today.
JYP: well, for me JYP ist still Twice and Just Twice. Twice = JYP.
Big Hit : I honestly don't think big hit created bts. no, bts is the result of years of armys hard work. they fought for bts everywhere and with everyone.
BTS members are humble people, but I don't think they ever had ambitions to become that big. Army decided that they wanted to make BTS big and they did it.
even now that army has put almost the whole world at their feet, BTS is still these humble kids with poor backgrounds. i can't imagine what other artists with ambitions would do with this enormous popularity. but BTS members continue to release free music on Sound Cloud, like unknown beginners or youtube singers.
it was armys who had big ambitions, not big hit or BTS.
BTS is undoubtedly one of the most talented groups in kpop ever, but they did better when they were poor and were fighting.
now BTS is not fighting anymore, their art is also not the same anymore. they are now just expressing their wishes loudly " we want #1 BB , we want grammy , we want that all our songs reach hot100 BB"....
and army does it for them.
their music has also become like that, like easily digestible food.