i'm almost positive it did not.
she threw a fit when he forced jaguar out because they were about to go public, and that cost everyone money. and yeah, it would suck to lose that money considering how she had to debase herself to get it and she had a right to be mad at that instant. but again, they didn't tell him they were meeting with bankers about it, and that likely would've changed his attitude about the slob.
but afterwards, he signed chevy and merged with ted, giving her a pretty sweet setup and her ownership points were worth way more moving forward. that all setup the eventual mccann offer, which made her rich.
in fact, when they were voting on whether to allow him back or not, they discussed how it would cost them a fortune to get rid of him, because of his partnership stake (they would need to buy him out). that's when cutler started fucking around to force him out on a technicality, which wasn't working until burt croaked.
the bottom line is that everyone who was ever interested in buying/merging with the company was because of don, and once she had a partnership stake, she would've known that, yet she still acted like he wasn't needed - then or ever.
yeah, he was drinking too much (both before and after the warnings), but it wasn't until he white-knuckled it in the hershey meeting that he got himself in trouble. the drinking actually had little to do with it. he was just finally coming to terms with who he was and where he came from.