i'll tell you the hell - a loud and angry promise that you're going to explain why so

a loud and angry promise that you're going to explain why something is the most ridiculous thing ever

I'll tell you the hell, this is the dumbest thing I've ever heard!

I'll tell you the hell, I'm not even mad anymore, I'm just tired of this.

I'll tell you the hell, you're going to laugh at yourself after this.