WTF are you talking about? He made his shot. The dragon was hit, but was so large (because it was the Alpha Dragon) that it withstood it. LOL your bias can't even allow you to comprehend what happens in a scene in front of your own eyes. Also, he saved the chick, so he did sacrifice himself, and it was his plan, so he did save humanity.
You haven't seen the film, just admit it. You're just butthurt because this is a Quanchi thread or because McClane is your butt bud. You have yet to post or even list a single pure H2H face-to-face match McClane has won with his pure fists without resorting to a melee weapon or using an entire staircase. McClane knocked a large man out in DH5 , but that was a cheapshot. Same with Lihn in DH4. They probably would have blocked or dodged it if it was a face-to-face match, and proceeded to WTFpwn McClane.
McClane loses because all his blows will be easily dodged, because McClane is an established poor fighter, which is why he uses so many melee weapons.. You are trying to give him abilities which directly contradict his character. Van Zan wins because this is a H2H match, and Van Zan has skill in H2H, whereas McClane doesn't. McClane won't touch him, and it's not because Zan Van is invincibly untouchable, but McClane is almost effortless to dodge. Arnold Poindexter could dodge his hits.