Russo's destruction was awful - I kept yelling at the screen DON'T GO IN THE ROOM! DON'T TAKE THE DRINK! GET OUT OF THERE! I actually had to leave the room when he botched the interview. However, I didn't have a problem with the way Underwood dealt with him - perfect chance to rid himself of an unstable timebomb that would have likely destroyed him dropped right in his lap. As Frank himself said in one of his Ferris Bueller moments, you don't let opportunities like that pass you by. But it was painful to watch.
It's really going to suck having to wait a year for the next season. I'm hooked.