I know, and very glad he's gone from the UFC.
His style is running around all day, looking for that perfect, usually SINGLE countering potshot. There are Boxers who do this in Boxing, and they're boring as hell too and rarely gets any fights. He rarely commits to an exchange unless he go trapped while running....or it's around at the last 30 seconds when the horn's about to blow so if he gets taken down, he'd be saved. This is generally why people boo him, unless he knocks someone out. He generally gets booed constantly while he's fighting.
Of course Machida's going to tout his Shotokan Karate, that's his family's legacy. He's not going slap his father & family name in the face. But it doesn't mean that new, aspiring fighters are going to flock to Shotokan Karate in order to become great fighters. They go to Boxing, Wrestling, BJJ, and Muay Thai, in general. Children's Karate classes are what pay the bills, but it doesn't mean that people want to watch that.