That's on him. If we review, Jordan face the same dilemma and raised holy hell, non stop, challenging ownership until they got him help.
Let's review then:
85 season: Jordan drafted, rest of the team sucks.
86: Oakley (draft) and Paxson were added. MJ hurt this year? Seemed to be limited in games played.
87: nobody added
88: added Pippen (draft) and Grant (draft)
89: added Cartwright & Perdue (draft), dumped Oakley
90: added Armstrong (draft)
91: nobody added [won title]
92: nobody added [won title]
93: nobody added [won title]
94: retired at 31 (because, you know, he was so dedicated). Kukoc & Kerr added. Not MJ related.
95: still retired. Longley, Harper added. Not MJ related.
96: Rodman added. [won title]
97: nobody added [won title]
98: nobody added [won title]
99: retired at 36 (before coming back with the Wiz...)
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04 season: Lebron drafted, but this team had Carlos Boozer, Ricky Davis, and Ilgauskas.
05: Boozer and Davis gone. Gooden added.
06: Hughes added.
07: Varejao added.
08: Wallace & Marshall added.
09: Williams & Szczerbiak added. Gooden, Hughes, & Marshall gone.
10: O'Neal, Jamison, & Telfair added. Szczerbiak & Wallace gone.
11: Lebron gone.
From what I can tell, the Bulls mostly built through the draft. The big pickup during MJ's 1st tenure that wasn't via the draft was Paxson (as a trade I think). When MJ retired (at the ripe old age of 31...because he was so dedicated), they picked up a few players. Once he came back, only Rodman was added. Then he retired again before going on to play for the Wiz. I don't see much dedication from MJ -- what I DO see is a team that had much better players put together so Jordan could be incredibly competitive, with a solid supporting cast, that won in his 7th year.
With Lebron, not a single decent player was added via the draft. Most of the veterans added were too old, or there was only one decent player added and not much else. You can only deal with that for so long. I'm pretty sure the failed attempt at winning with O'Neal and Jamison was the last straw. And by the way, Jordan quit on the Bulls twice. So it's not like Lebron leaving after 7 years tarnishes his legacy any more than Jordan ditching the Bulls 2x. In 10 years, someone will look at the next superstar and criticize them for not being like Lebron, because Lebron's career will take on some kind of larger-than-life status too, just like MJ's has in your perception.