Didn't heard any story from his ex-spouse but man's a classic example of narcissist, allegedly have toxic working environment in Yeezy, and also spewing hate speech left and right. Maybe not to the point of Chris Brown but doing it mentally also count as abusive.
I mean he's always been like this, it's just getting worse.
Before Donda passed, he already had the infamous "George Bush hates black people" thing and already ran up on stage at the EMAs to say he deserved the award, not the winners. I'm sure there's plenty more documented exmaples , and in those days, the spotlight wasn't on him 24/7.
They are divorced, and there was a dispute over several months (or years) to resolve the divorce with several rumors about cheating and other controversies. Not saying that it indicates an physically abusive relationship, but the relationship wasn't great either.