I hate the whole ad series.
But the ads aren't aimed at us. People who are bothered enough to choose Windows because of them are an extreme minority. People who like them are a larger group. But even more important is the big group who get the message whether they like it or not: "it's not crazy to consider a Mac instead of Windows." That's not new to us, but it IS new to a vast number of people who never had Macs on their radar at all. They don't care what supposed advantages Macs have, they know that only Windows is a rational choice--and they don't even know why. They choose Windows "just because." Apple needed to challenge that, and they have.
As for mention of Microsoft being a bad thing, I don't think it is. Microsoft already has 100% mindshare. Reminding people that Windows exists is no threat--nobody ever forgot it. In marketing, the rule of thumb is that an established leader shouldn't ever mention the little competitor and give them any legitimacy. But the reverse isn't true: the little guy CAN go after the monopoly and make some headway.
As for showing the details of OS X--that works in print and online, where people have time to read and think and see high-res images. It also works in a physical store with demo machines. And Apple does show OS X in detail in those places. But in a brief TV spot, at far less resolution than a computer screen, you can't show a complex desktop computer OS and make an effective point. Some details you could show that way, but the real message about what makes OS X better would need to be explained, not shown. Better to get people interested, and lead them to the real details online.
Thing of the TV ads as the entry point for the message--the topic sentence of the paragraph. You lead with that, not the details. The details won't be absorbed anyway unless people have accepted the initial message: "it's not crazy to consider a Mac over Windows."
I suspect some data has been gathered on these ads, and that the reason they keep making them is that they're working.
(And yes, like any 30-second ad, they present a partial truth rather than a full and detailed picture. That doesn't make all ads lies, but it does mean advertising is driven by profit above all. I don't like it either, but it's the case.)