the 42 win team in Lebron's second year didn't have boozer, didn't have davis. It was pretty much Lebron, Z, and a bunch of crappy young players or crappy veterans. Green, Westbrook, and Watson would have been no worse than the third, fourth, and fifth best players on the Cavs (and would not have been that far from Z). The Thunder won 23 games.
1) Z was an All-Star center in 2003 and 2005, which is way better than any of the Thunder big men. Collison and Krstic played a total of 68 games combined, and they even had to throw Johan Petro and Robert Swift out there to stink up the joint.
2) Drew Gooden put up 14 / 9 that year and was at least as good as Jeff Green.
3) Westbrook put up decent numbers, but he's a rookie point guard. He turned the ball over way too much (his assist to turnover ration was UNDER 2:1) and shot less than 40%.
Veterans help win balls games. Ultra young teams with rookie point guards and a mess at center don't.
Durant is not a leader and doesn't make his teammates better. He is a terrible rebounder. His defense is way below par. He is an excellent scorer, but excellent scorers without anything else, are not franchise builders. Sure he will be getting a max contract, but if Durant was my best player I wouldn't feel confident at all about winning. He is just not a winner.
If you think LeBron was way ahead of him as a winner in this second year, that's fine (although I disagree). I just don't see how you suppose to know whether this guy is a winner at this point in his career.
So far you say:
He's a volume scorer (totally untrue, he's very efficient)
He's a lousy rebounder (3rd leading rebounder at SF in the league)
He has no all-around skills (actually, he's a pretty good rebounder, has decent assist totals, blocked shots, steals...)
I'll give you lousy defense, but that's pretty common at this point. LeBron didn't play much defense until the last year or so.
Like I said before, no need to exaggerate Durant's weaknesses to make LeBron look good.