I can't speak for him but I know I hate 1v1 matches without items. used to be in a league in college back when Brawl came out and it was really repetitive. Same levels, same characters, same items (Read: none), and it was like playing 1% of a game to me. I just don't see the appeal.
The thing I like about Smash is that anyone can play it from literal babies smashing buttons to some of the most hardcore pros out there. I'm the kind of gal who plays it with all items, all stages, random characters, smash balls/gauge on. I love how hectic it is, and playing for fun is just the best because I can have 8 people playing all at once on the same screen and nobody cares about winning because we're all having too much fun. When it's 1v1, no items, omega/Final Destination only it's just boring and the purity of competition drains the game of 99% of its soul and heart.
Plus I'm not that good anymore and losing sucks, especially when you're playing stock and get to wait for 5 minutes while the remaining folks duke it out because you were fooling around and lost all three of your stock because you were having too much fun to worry about it.
I'm decent. I can hold my own, but I hate limiting myself to a tiny fraction of the game's options just to experience a more 'competitive' version of the game; two modifiers I dislike in service of the other.
So I understood Runa when he said the game is meant to be fun. No idea why Mzuzek felt like being a prick about it. I also want to find a group of folks to play with online that just have fun and don't take it too seriously. I only like playing time battles with all items with random stage and random characters.
I'm being a prick about it because it fucking triggers me when people say competitive players don't like to have fun. So much for how "elitist" competitive players supposedly are, maybe it's the other way around...
I mean, you just talked about how you like that Smash can be enjoyed by both babies and hardcore pros... and then talked about how competitive play is boring, repetitive, and drains the game of its soul. Does it get any more contradictory than that? Competitive play doesn't drain the game of its soul, dude, it takes it to incredible new heights. Smash has succeeded and continues to grow as a competitive game because of how deep and unique it among every other fighting game. There's a certain "freeform" feel to Smash that isn't present in any other fighting game, that much I think we can all agree on, and competitive play just takes this freeform feel to its maximum (which also means exploring and understanding a wide array of mechanics and interactions that only exist in a game like Smash), while reducing the luck/unfairness factor as much as possible. Yeah, most of the game's stages aren't suited to competitive play. Yeah, items aren't suited to competitive play. And neither are stage morphs, final smashes, or 8-player free-for-alls. It's called a "rule set" - competitive players choose to play the game a certain way, because it allows for the most balanced competition; casual players, well... they also choose to play the game a certain way, however they have most fun with.
You say competitive players ignore most of what the game has to offer (not quite true, because mostly every competitive player started out loving Smash casually and has played through most of the single-player modes and probably played a decent amount of casuals in their life), but the moment you say "1v1s are boring", you're also choosing to ignore it. That's exactly what's cool about Smash, that anyone can play however they want. It's just annoying when people like you or Runa, who prefer casual play, feel the need to call competitive Smash out for being "boring" or saying competitive players don't like to have fun.
This might boggle your mind, but competitive players play the way they do because it's exactly how they have the most fun.