Hawkforce...
The problem you're having is that your premise is wrong from the start.
The NCAA is not trying to find the best team in the nation. It's trying
to find a tournament winner. Subtle but important distinction.
It employs the tournament format in order to achieve it's true goal... to
make as much money as possible from the event. The format is exciting
precisely because it is unpredictable. Purists may be more inclined toward
a best of 7 between whichever teams they believe are the best but the
HUGE numbers of fans who watch in hopes of seeing David knock off Goliath
would be lost.
This is entertainment, pure and simple. The more widely appealing the
show, the more revenue to the principals. So, if you're hung up on looking
for the best team (subjective from the start) then you will save yourself
a ton of frustration by just watching something else.