Some people do take competitive play too far, thinking there's basically one beat-all algorithm that if done correctly automatically wins the game. They simply over-analize the game; this algorithm doesn't exist since anything can happen, but a lot of people believe there's a point of pure perfection when there isn't. Smash has pushed farther from complexity than other fighers, and that's way this game is so awesome IMO. Playing competitively should be making the game more fun for you, not less. It shouldn't be about learning tech A and tech B, but about improving your abilities in-game, knowledge, and experience. For some people it's just a really big, sudden jump, and they don't like that, especally if they're extremely casual.