Well, I for one have trouble picking up on every single cool advanced technique a high-level competitive player does in Melee. And from the standpoint of a tournament viewer, I live for "cool tricks" and mindgames. Brawl, to me, is a lot more transparent in terms of what's going on in terms of positioning, pressure, and mindgames during a match. That might just be because it's been too long since I've last played Melee.
As for helpless defenders: Marth chaingrab vs. Fox. Also one or two other 0-death matchups I've seen in Melee that I can't recall off the top of my head. (Not as bad as Smash 64 though. Or the Ice Climbers in Brawl with their multiple multiple multiple chain grab infinites.)
I won't go into the stuff you were incorrect about because other people have already discussed it, but let's look at combos in other highly viewed fighting games.
Marvel vs Capcom is the crowd favorite, with generally the highest viewership at evo. Now I can't get into specifics because I don't actually know much about the game but I watch it often and lemme tell ya somethin. That game is essentially just trading big long flashy combos. That, and the game is extremely hard to play requiring precision on combos and AT's that make melee cry itself to sleep at night. And yet it is the most viewed fighting game. So what does that tell you?
Next up is street fighter, also heavily viewed. The game has shorter cmbos than MvC but that isn't exactly hard to do. As a matter of fact I would say the average SF4 combo is about as long (maybe longer) than melee's combos, and SF4 combos are almost always impossible to get out of. Also talk about complicated AT's, have you ever seen a Focus Attack Dash Canceled quadruple shoryuken?? It's not easy to pull off.
Both of these games exentuate the qualities that you listed as undeairable in Melee to a much greater degree than the gamecube party fighter ever does and yet SF4 and MvC are the most popular *spectator* games at evo.
So I get it, you don't like melee's combos. But, like, that's just your opinion. Objectively combos and AT's are very popular in competitive games.
Now can we quit arguing about combos and focus on posting videos of them?