I think the hardest thing is playing good in tourney when your opponent is scaring you with their temper; especially when it's your Wii they might be pulling off the table. They need to play against some intimidating body builder that just says "Calm the f down"
That's you. There's various times myself and others have awe and inspiration from getting owned by someone. It's about being able to appreciate what they're doing, which is often analyzing and caring to read and counter you more than you might care to analyze yourself.
You do have to be in a decent state of play to truly appreciate, never feeling at your full potential with a bad controller and bad sleep and such. You also have to be at the level where you can give people a challenge where they do need to analyze you, which is mostly having your tech skill down. Some people don't like to spend time on practicing tech (I enjoy it at least to an extent
http://smashboards.com/posts/17098767/ ), but you don't need that much though to be at a point where you'll expand upon it when you play with others; especially compared to any other sport, craft, or fighting game.
Then there's losing to something that's hard to appreciate, not being combo'd and read to death but instead camped and timed out, or feel the match up is horrid. Pick up one of the dozens of all viable characters that might mitigate the style of interaction you don't like.
THEN there's also people being sore losers, where they actually might be better than their opponent and usually are but being a stinker on them instead of encouraging them for winning with a little luck their first tournament of their life. Even if the player who won might be overproud of themselves for luck or unfair circumstances (celebrating their victory like they should be), if you don't believe they're gonna win another tourney again then you might be right; but then you're gonna show yourself to be a super baby by trying to tell them that to make yourself feel better.
That's not the same as someone pressing taunt against a player who's known to get upset over it, that's a plain ego weakness you might want to exploit in tourney lol.