If Australia won in Adelaide, then the final result would have been 2-1 our way - a thoroughly undeserved series win, by (arguably) the worst Australian Test team ever.
I don't think it's really arguable. Surely the only contenders would be the 1980s teams post-WSC/mass retirements and rebel tours.
Even then we still had Allan Border as captain and I don't recall us going an entire series without a single batsman making a century.
This lot of batsmen are pure garbage. The bowlers were woeful on the whole too. India out-bowled us on our own pitches.