Idk if it’s true or not but here is a reason why he dissed bang pd
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Well that means HYBE has tried to buy them out now twice. Once when Block B was at their peak and before they got Zico and Zico's label KOZ under HYBE, and then now another time that ATEEZ is talking about.
It is almost like trying to destroy people who do not even bother you, is bound to rebound back at you. 
It's just 
a general rule of life.
Fellow atiny showed me i just said what they couldn't