Obviously we don't know the full extent of his relationship with Whitney, and based off Mr Morale it sounds like they went thru some wild shyt. But I also think Pusha T is right: Drake has a problem with marriage (and long term relationships), perhaps specifically black marriage and long term relationships. Most of the people he has dissed have been in a relationship, and in cases where they weren't he has deliberately targeted the exes to foster resentment. He's out here talking shyt about Weeknd's ex, he followed Mustard's ex, he flies Ross' ex around to troll. And of course he hates that ASAP is with Rihanna long term, and he hates that Kendrick has a black family structure. And he hated that Meek was with Nicki.
None of this is normal behavior. And I bet he hates the fact that Pusha exposed his kid for the world to see. I know the crux was an Adidas line but honestly? I don't think that line was gonna come out even if Pusha hadn't said shyt. I genuinely think Drake would have backed out and went back to not acknowledging his kid, besides whatever money he sends the mother. He resents the responsibility, and the fact that his child (or...children lol) came from a thot instead of a wife.