I dont know if this is true but I read online that some of her beef with Dave may have been connected to her friend's beef with Dave. Steve Winwood and Dave were both in Traffic and had a big falling out and could not stand each other.
You gotta love Chris with what she said. If you remember her online 1995 chat she says the new creation of Fleetwood Mac is really "bizarre". She says Dave is a fine guitar player but would not have been her first choice and he does not fit with the band. I remember at the time how harsh that sounded talking about a current member of the band. But now we know why.
Here is the chat which is fun to look back on. I love the fact she admits listening to Mystery To Me the other night and is one of her favorite albums.
https://www.fleetwoodmac-uk.com/articles/FMart106.htm