Sakurai also gave us Melee Kirby (pick a throw, any throw. It will ****ing suck)
He gave us Brawl MK and IC's, and Brawl Ganon. D3's cg, infinite, and buffered silliness. DK and Sonic's semi-invincible slant abuse
64 Pikachu vs 64 Samus
He gave us tripping
Ya, he doesn't know what he's doing. He's great at making characters feel like they have a unique personality based on how their attacks work, how they move, etc but hell there's so many balance and viability issues that could have been fixed with 30 min of scrutiny, that it's real hard to say he's a genius of good fighting games
Or put it this way: Melee's engine and options are highly complex, yet Sakurai certainly didn't conceive or work towards that grand picture. He sat down and made characters, but didn't "weave" the cast concerns into each other. If he really did that, it would be hard to miss stuff like Sheik Dthrow. Every Smash game feels that way: you see the work put into individual characters, but good luck if you think a lot of alternative time/effort was put into studying how characters interact with each other.