>>102089883 (OP)If you want some juicy ones, look into NijiEN.
I'm not even talking the Selen thing. Ike fucking hated Luca and Vox for different reasons. Luca was getting the royal treatment despite barely working and leaving everything to his skinwalker, and he could never get out from under Vox's shadow to the point that he could only ever get praise from fujos by saying shit like, "Vox cried because he was so proud of how he raised Ike" etc. which eventually caused him to snap at a fan, leaving them to get devoured by the rest of the sisters.
Vox and Reimu's another one. They were pretty close, but after that ASMR thing, their relationship clearly and completely broke down.
Pomu and Luca is a big one too, but not for the reasons a lot of /vt/ likes to meme her with. Luca was obsessed with Pomu. He was always invading her streams. Always trying to get her attention in stream chat. During group collabs, he would always target her and harass her or hang around for no reason. When Pomu told a story about a childhood friend, Luca instantly tried to get himself shipped in AS that childhood friend.
I think this went on for about a year, with her fans complaining about it regularly before Pomu snapped and basically told him off and to leave her alone, even banning him from her channel.
My theory is management forced her to stay quiet about his obsession. Maybe they tried to pay her off like they did with Twisty. She probably got punished for rejecting him.