It has gotten very obvious lately, with YG deliberately BP out of any of their cringe "YG family" branding posts and videos and now the TOP mess.
Winner seems to be the closest to BP in YG, which makes sense because they seem to have trained with them the longest. I think iKON also seems to like them but they just aren't close thanks to YG not letting them speak to each other after the whole Miyeon dating an iKON member situation. And then there's 2NE1 and Big Bang.
I don't think BB's dislike of BP is because of 2NE1. BB was obviously okay with BP back in their early days, there's plenty of videos of them chatting at SBS Gayo 2016 and all BP members were invited to Taeyang's wedding. Even at the start of HYLT era there was some interaction. So what changed between June 2020 and now? Perhaps it The Album outselling every BB release and then some and cementing BP as YG breadwinners? Because what TOP did today was fucking shady lol praise 2NE1 all you want but there were 321310 tweets about their Coachella performance that didn't mention BP so why not use one of those instead