@trafalgarlaw: I don't love watching Melee either but saying it shouldn't be there is silly. Sure many people see it more as a party game; there's also tons of people who play Marvel the same way, when I play with friends most of them have no interest in learning combos or how the mechanics actually work, they just throw it on simple and watch the pretty lights. The same could be said of Mortal Kombat which has far more casual players than competitive, or really any fighting game (the people who play seriously are still a minority) but that sure as hell doesn't mean they're just some causal party garbage. There's plenty of people who play Starcraft II and never touch the online instead just playing custom games, or people who only play Gun Game in CS:GO, or grab a couple of Warthogs in Halo and slam them into each other and think SWAT is dumb but none of those things dimmish their viability as a competitive game.
Also Smash has its own "Evo" in the form of Apex which is happening this weekend. Melee hit 1024 entries, and would have gotten more if that wasn't the cap (Marvel only had 1014 last year at Evo for the record). While you say it has little relevance today, it's one of the few 10+ year fighting games (and yes it's a fighting game) that not only are we still talking about today, but has a growing community that is likely the second largest after Street Fighter. And while you find it boring to watch, Melee is one of the highest watched games at Evo every year (last year peaked it peaked at 137,800 versus Marvel's 149,470) so there's certainly an audience that enjoys watching it even if that doesn't include you and me.
And even if it's boring to watch, who gives a fuck? Evo is not about the spectacle, if that was the case Injustice (and arguably Street Fighter depending on who you ask) wouldn't have lasted a year and KoFXIII would be there even though no one in the US plays it anymore (which is why it was excluded). It's a chance for the various fighting game communities to come together, celebrate, and more importantly find out who's the best in their community (which is of course the goal of any tournament), not just in their area but in the world. The sight and spectacle are nice but Evo has never been for the stream monsters, it's for the people who actually play the damn game, which I love. You may not find the more technical side that the top players bring interesting but for a lot of people such as myself that is part of the draw. I want to see the best of the best, I want to see that advanced tech that I didn't even know existed and players do things in the game I didn't know were possible; I want to walk away and learn a dozen things I can incorporate into my own play, with motivation to pick up and try a new game, or even just with a new respect for a game I viewed as simple.
And even if none of that matters to you , don't watch for a few hours. Go for a walk, grab food, and take a break from watching all the other awesome games there.