While I quite disagree with your assertions about MS and what their minor investment in Apple represented, I don't see the need to get into it. However, suggesting that Apple sell or license their OS is pants-on-head ridiculous. If you wind you history just a couple years farther back from when Bill Gates was "saving" the company, you would see that Apple tried what you suggest, and it was an unmitigated disaster. In fact, I would say the only reason Apple has a market at all is because Jobs immediately killed the Mac clone program upon his return.
Think about what you are complaining about: the fact that an eleven year old computer can "only" run the second-most-recent operating system all these years later. Would you have been angry that your '91 Powerbook 100 or Mac Classic II couldn't run OS X in 2001? Things move on. I prefer my Mac OS to be as lean and optimized for new technology as possible, not full of legacy cruft to support ancient processors.