Jungkook wanted to yell, scream, just to something to vent out his anger. Couldn't sing, couldn't dance, not good looking, Jungkook saw all these comments about his Seokjin hyung and hated it. Jungkook knew how hard his hyung worked, often losing countless nights of sleep to show a 3 minute dance to a bunch of fans they would probably never see again. He knew how hard his hyung had it, at yet still finding time to take care of his band mates. He cooked, cleaned and did laundry for BTS. Jungkook knew that everyone tried to help him out as much as they could since they all loved hanging out with Seokjin. He was a better person that Jungkook, who was shy and hated being around females. Jungkook didn't like being around people much and Seokjin made it better. 

Seokjin was an amazing hyung and he basically raised Jungkook from an awkward teenager. Jungkook owed everything he had to Seokjin and he even though he teased Seokjin a lot, he always showed his respect and gratitude. He bought Seokjin clothes and food all the time, feeling good inside to see Seokjin smile and laugh. Jungkook was grateful for Seokjin and for all he's done.