I have always been team Nicki in this mainly because she is the more talented rapper and I do think that there was a concerted effort to take her down using Cardi and Remy for a little bit.
However she seems to have turned into a zany conspiracy theorist who literally thinks everyone is out to get her and she's desperately trying to get revenge.
She thinks Cardi is working with Roc Nation right now, and we already know she thinks they are her enemies so she's justified in attacking Cardi.