I really think it's mostly the issues with having advertized it for last gen consoles and then not actually delivered a playable experience on them. It sounds like there are indeed a lot of other bugs, but those seem like issues they would have been permitted to patch their way out of over time.

COD Cold War is another big title this year and is quite buggy, but it is playable in spite of those bugs on all the systems it was advertised to work on.