No I didn't. I, too, fancy myself a game designer, and yes, he does from time to time actually address real design concerns, and he can (and does!) shine at that. But that isn't really why I or most people watch these videos.You completely missed the purpose of Zero Punctuation. See, Yatzee fancy himself a game designer, and he review games from that point of view, unlike more "serious" review sites who review it from the point of view of getting web pages hit to drive the ad money.
Some of the things he pointed out about the game are true - a party game should not require you to spend hours unlocking characters like Sonic and Snake (or really, anyone) because that is antitheitical to the purpose of a party game. The camera zoom is another worthy issue to address.
However, if you're going to address a game from a design standpoint you also have to look for what it hit, and he often misses things which games DO hit. I think a large part of the popularity of SSB and Halo is their highly intuitive interfaces; you can pick up a controller and within 10 minutes you know what you do to do what, with no instruction manual necessary. In fact, I have always seen those as the greatest strengths of those series and why they are so popular, and I think on a deep level that IS why they're more popular than the standard fighting games/FPS games.
Moreover, SSBB (and its predecessors) have this nice property where it is difficult to become "that guy" accidentally; simply playing the single player will make you a bit better, but not so much better that you constantly crush your friends who only play it on weekends. What makes you better at SSB games is "gainful practice", which mostly constists of either A) playing against people better than you and really a lot of B) experimenting with what works and doesn't, then learning how to do what does work perfectly. It takes actual effort to become that guy, and that is another strength of the game - if playing it for ten hours in solo mode to unlock Sonic is necessary, then at least once you unlock Sonic you and your friends should still be able to play on relatively equal footing, and this game succeeds at that.
Saying such games are random button mashers is simply wrong - they aren't. But SSB is meant to be a party game, which means that among random people what you do should be fairly obvious, intuitive, and shouldn't bother everyone else, and no obvious strategy should clearly overshadow all others at the casual level that 99% of people who play SSB play it at and just because you've happened to play it twice as much as the next guy shouldn't make it so that you can't play it with them.