Questions about Seiji Ozawa’s last years with the BSO

Like many of us, I’ve been paying close attention to what’s happening at the Boston Symphony Orchestra, with Andris Nelsons not getting his contract renewed, the reaction from the musicians, etc. That includes several subreddit threads here which have been very informative. I’ve also been reading various online news sources about the recent developments.

What has genuinely surprised me is hearing that Seiji Ozawa’s last years with the BSO were considered subpar, controversial, frustrating, etc. It appears there is a consensus that Ozawa did not leave on good terms. I never knew this, and have always had a very high opinion of him through his recordings with the BSO. I’m interested in what happened with Ozawa and the BSO at the end of his tenure. Why are those years considered a “decline”? Does anyone here have insights into what went wrong? Is this even an accurate assessment? Thanks in advance.