Why not go even further and use round-robin groups in to a triple elimination bracket to prove who is the best once and for all? Why not run the main tournament again and again and again over a week until a team wins it twice in a row so that we know they (seemingly) had more consistent skill than the others? Etc etc etc.
Of course those are extreme examples but that is the point. You seem to think it’s fairer to play longer sets to determine who has longevity when THAT would arguably be ‘unfair’ on a player who has problems concentrating hard for more than several minutes at a time. There is no ‘best’ tournament format, the argument you put forth in that paragraph above is popular but that doesn’t make it objectively true. We all know KO is an amazing player, I’m not sure why he needs to win SBO with a different format to be validated for you.
This totally ignores the point I made about KO being able to organise his own double-elimination tournament if single-elimination bothers him that much.
What would you say if hypothetically at the next five SBOs (presuming they happen) KO’s team is time and time again put in to losers by a team full of legends, then sent home from losers by another team of legends? Should it have been triple-elimination over those events instead to truly prove KO deserved to win? Should teams have played 3/5 sets all that time to eliminate all your doubts?
Single-elimination is just another way of structuring a tournament, it isn’t inherently better or worse than any other format despite what you would like to believe. The “random” and “clutch” aspects are countered perfectly well by it being a team tournament and the fact that he’s entered every single year, so the bottom line is that KO and his team-mates have simply never risen to the job on the day (and they’ve had more than enough years to snatch a victory through ‘luck’). That doesn’t mean the system should be changed just so he can finally win (what if he still doesn’t?). SBO is a harsh tournament system, but that doesn’t make it unfair. Nobody forces KO to participate and nobody stops KO from creating his own tournament if he would prefer a different ruleset instead.