Hot as heck rotor and shaking steering wheel

Simple problem, simple solution. Remove the wheel if you want better access, but you don't have to. Grab a large channel lock pliers, find the metal bracket in the middle of the rubber flex hose, and peel that crimp open a little. Rust builds up inside that crimp and constricts the hose. You can force brake fluid down to the caliper because it's under pressure, but it won't release freely. The dragging brake makes the fluid get hotter, so it expands and applies the brake even harder.