I agree with the things you mention about the Vettel/RB package making things harder for themselves. It is an unpopular opinion but I also firmly believe that the RB5 was, talking about the full course of the 2009 season, was on par with the BGP 001. Brawn's pace was deceptively good in the first couple of races, but even as early as Malaysia and China, one could see that they suffered from tyre warming issues. Had it not been for the red flag, Malaysia would have been a W for Toyota. And from the British GP, Brawn was hopelessly left behind in the development race as after early May not a single upgrade was made for the car anymore. The team simply run out of funds, and they had to survive until the end of the year with the package they had in early May.People always talk about the double diffuser (the one that made Williams and Toyota so victorious ... oh wait) and the first seven races, but even early in the season, Brawn was vulnerable. It was down to Vettel for not being able to capitalise and do more damage. He collided with Kubica in Australia for which he was penalised and subsequently spun off in Malaysia. He then crashed out at Monaco, and gave up track position to Button at Turkey due to a mistake on lap 1 and ultimately ended up only third even though he had both the pace and the track position to control and win the race. This is four races out of the first seven where he should and could have done much more, and that's exactly why he lost the title to Button even though from the British GP onwards the Red Bull was a better car to have bar Monza.
Completely agree about 2009.
2009 was a great year though, Toyota went from locking out the front row to being on the back row in consecutive races, loads of teams won (or could have won) races, you never knew when turning up who would be quickest.
We could do with 2022 being similar.