Boehner was anything but sensible and pragmatic. He was a radical extremist, bringing a new low to Congressional brinkmanship and strategic sabotage. His hackery was limited only by the bounds of possibility - and Teabaggers blamed his adherence to those limits on him. If there's one thing Teabaggers hate, it's reality after all.
In many ways, Boehner's political death is poetic justice. He created and enabled this sort of magical thinking as a political strategy, and it destroyed him.