There's no reasonable way to make a change, which is part of why it's depressing. McCarthy cost us the win more than any other single factor, but he's also a huge part of why this offense got so far. If you were going to replace him, you'd have to rebuild the team... Which is way harder than it sounds, even with Rodgers to build around. Rationally speaking, the best choice is to stick with him and hope he catches lightning in a bottle again. But it'll be nothing more than that.
(Also, I was never onboard with the McCarthy dick sucking)