Eh, sometimes it happens, no chemistry, wrong game, someone is too pushy, etc. There are usually a good number of variables that can go wrong on collabs for some of the people involved.
Best thing to do is support her on her streams, but not by being a white knight and telling her you like her a lot and all that, that never works. Just watch her streams, be there, play along (SC bullying is fine if it's just to play around, like the english streams), and if possible and your wallet doesn't get hurt, throw a SC here and there or become a member. Chuubas are entertainers, and getting a tip for doing what you like is something they, and pretty much anyone, always appreciate.