McKay went on to direct and co-write The Big Short, a much more political comedy based on the 2007-2008 financial crisis. It received four Oscar nominations and one win for best adapted screenplay. Despite this clear growth away from Ferrell comedy vehicles, McKay's agent Jimmy Miller kept pushing McKay to work again with Ferrell, who he also represented.
"Everything kept steering back towards, 'Well, when are you going to work with Will?'" he says. "And then finally I was like, 'Jimmy, come on. Clearly I'm going in a different direction. Hopefully, it's no hard feelings.' I've learned some lessons," McKay adds. "It's always hard feelings."
McKay dropped his agent and went on to produce 2018's Vice, the Oscar-nominated, critical bio of former United States Vice President Dick Cheney. Meanwhile, Ferrell released the critical and commercial failure Holmes & Watson, appearing alongside longtime co-star John C. Reilly. McKay was brought on in the latter stages of production to help with Holmes & Watson's theatrical edit, but described it as being "in rough shape" by the time he got there.
After multiple flirtations with shutting down Gary Sanchez Productions, the deciding blow to Ferrell and McKay's relationship came down to a casting decision in the upcoming HBO series about the 1980's Los Angeles Lakers. Ferrell, a huge Lakers fan, was replaced to play Lakers' owner Jerry Buss, by none other than John C. Reilly, who McKay wanted for the role and failed to inform Ferrell out of fear of hurting the actor's feelings.
McKay and Ferrell issued a joint statement in 2019 announcing their split as business partners, and the last time the pair reportedly spoke was a brief phone conversation to confirm the split.
"I'm like, 'F*ck, Ferrell's never going to talk to me again,'" McKay said. "So it ended not well."
McKay says he's emailed Ferrell in an attempt to reconcile since then, but has never heard back.
"I f*cked up on how I handled that," McKay laments. "It's the old thing of keep your side of the street clean. I should have just done everything by the book."
It's an interesting read, sadly business came in the way of friendship and that ultimately ended theirs, made me wonder why we haven't seen any projects with them recently.
https://www.ign.com/articles/adam-mckay-will-ferrell-split-explained