I think McD wanted Doncic also. That would explain some of the scouts getting canned, especially the international. Say McD is set on Doncic, Sarver says Ayton, James Jones breaks the split and says Ayton also. We see Ayton as an absolute beast through preseason and how special he could be while Doncic is just sort of there in Dallas. McD was on thin ice anyways. That could have caused it. Sarver and Ayton are both UofA guys and perhaps that is why Sarver went to see Doncic play a few times, trying to see what McD did to avoid another Bender scenario. He looked good but Ayton was the clear choice and everything since then proves it. McD wanting Doncic, event though he didn't get him, might have been enough when added to Bender, Chriss, Knight, etc to finally part ways. He wasn't as good as the Booker and Warren picks appear.
If McD couldn't draft his guy at #1, Doncic, perhaps that's why he went after Bridges. He's someone who can shoot well from outside and is a good defender. He's not Doncic but that gives McD a wing he liked a lot as a consolation prize. He spent too much but it never seemed like the cost bothered him.