He wasn't ready in 91/92.
1998 he played injured.
1999 he was in the worst form of his life because he was coming back from the injury.
2001 he was still battling injuries. He only truly recovered from his injuries some time in 2002 (he averaged 71 vs New Zealand at home in 2001)
2004 he averaged 30 in India and missed a Bunsen ironically due to picking up another minor injury. The test he missed, Clarke took 5/9. He did get one five wicket haul on this tour and this was the truest reflection of his talent.
It really was as much a case of a combination of injury and India's batting skill against spin, particularly Tendulkar. But it's telling that Warne didn't even pick up much in the way of cheap tail end wickets against India.
Basically this run of series:
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