You clearly don't actually watch the races. Red Bull should have won races on pace early on last season. They got stuck more than once behind other cars and made mistakes in races as well to hand the lead to Jenson.
There were more races the red bull was competitive than the Brawn. The Brawn fell apart at Silverstone which was less than half distance in the season. The red bull 1-2 at china and should have won more of the first 8 races than the two they did.
I think you'll find that's what happens with two decent/average drivers with a MASSIVE car advantage still almost give it away. Button has been racing for years, one single year he was really competitive, when the car blew everything else away, anyone that suggests otherwise because for one or two races it COULD have been closer, doesn't really mean anything.
For the first half of the year Brawn were CRUISING most of the time, just because Red Bull had issues, as everyone does at points, doesn't mean all that much in the end.
Red Bull have a significant advantage this year, if Vettel/Webber stopped trying to knock each other off the track, frankly they'd be miles and miles ahead.
Likewise if the Red Bull car this year had the Brawn's reliability of last year, the title would be over already.
Brawn were by FAR the best car for the majority of last year, thats simple a fact, no one even looked close, they weren't stressed, they cruised most of the time and a large part of the reason for such a big lead was no fighting over 1/2 in the team, Rubens was happy to play second fiddle and do whatever he wants.
I'd also say Rubens is a FAR better no.2 than Button, why, because he's proved it, for a decade. Last year, and previously behind Michael he'll happily cruise around the track blocking off anyone, staying in a safe second, then he'll put in a 5 lap stint where he burns around the track making Button, even Michael at times look slow. Its just a little "I can drive faster, I choose not to" message. The same way Vettel even cruising into second will most of the time put in the fastest lap just to show even cruising at no.2, he's really faster or at least as fast as Webber.
Meh, I've basically from memory never seen Button be interesting or exciting on the track. Its not about finishing 1st, or 20th, you can still put on a show, put in some good driving. Kobyashi has been pretty entertaining to watch on several occasions this year, slicing through the field, sometimes with way better tires, sometimes not. He was just willing to try at the last race, Button wasn't.
AT the end of the day, same with football, I don't care who wins, loses or doesn't finish, I want to be ENTERTAINED by what I see. I prefer it when Arsenal win than lose, but I'd take midtable and entertaining football than Mourinho Chelsea/Inter style football and every title ever.
The result is something that becomes a stat, the race itself is what you remember. No Button racing stands out in my mind as entertaining. If the field was 24 Buttons all being happy with where they were, I'd shoot myself rather than watch it. Same race with 24 Hamiltons would be completely insane, and it might result in 24 DNF's, but it would be fun to watch.