Juding him on a performance in 2012, is a bit rough. Those critiquing him likely wouldn't do it better.
Why? He appears no different to then. Is it for some reason okay to give a terrible presentation that turns off more people than it inspired, as long as it was 2 years ago? If something about presentation style had been learned than that would at least be something, but no.
Agreed that most people wouldn't do it better, that's why public speaking is a useful skill.