I don't think Frost has ever specifically and publicly thrown a player under the bus. He holds them accountable and will call them out if they aren't performing, which any coach would and should do, but he doesn't blame them for loses. He's called out Cam on snaps, Adrian on pics, other players for bad penalties, etc. Every coach does that. He also says the buck stops with him and blames a lot of it on himself and the coaches (ironically Bo was almost the exact same way in interviews) which he should.
And the clapping thing from Iowa was bush league, and illegal. Kirk can f#&% off. He knows what his guys did. It's the same as barking out the snap count on defense.