Yep! One of the two or three largest mistakes of his career.
Cost him my vote as well.
So, just to point out a small example of his courage. I've seen the video of this event multiple times and when McCain gave his famous thumbs down vote on the Rep. "skinny repeal" of the ACA (watch it if you can!) old Mitch M. is standing front and center in the assembly with his arms crossed and his full stern glare and McCain strides over to the center (right in front of Mitch M) and under full glare gets the attention of the Vote-guy, casts his thumbs down vote and looks DIRECTLY in the eye of Mitch M. (with NO animosity visible) then turns and walks away.
A VERY SMALL and easy display from McCain's point of view as he'd been thru so much REAL distress in his lifetime, but an act that FEW (if any) other members of Congress can find the spine to do!