Tyson did too much to say that he squandered his talent. Andrew Golota and Oliver McCall were just as big of headcases as he was and squandered their talent even more.
Waste? Hardly. Correct assessment would be that he did not maximise his potential. Still, the following accomplishments are not bad. Youngest champion in HW history Undisputed and unified champion 2 time world champion 5 time belt winner
Timeframe never lined up, but both Lennox and Holyfield were nightmare matchups for Tyson. I think Prime he could have got in LL's head, and landed a shot, but Lennox had the size and skill to keep him off... but Holy had no fear of anyone... and was always going to take it and dish it back. I think Tyson would go 0-2 against them at any point in his career.