My experience has been completely different. I own several macs now (and a PC), and I can say that my experience with Apple has never been short of perfect.
I've never tried Ubuntu but I'm guessing that it won't let your Mac communicate with your other apple products, and I'm pretty sure the level of support is not the same either. With Mac running OSX, you get instant support by phone.
I think maybe you misunderstood the rep. Assuming you mean the Macbook, it is touted as a "wireless computer" (see
MacBook - Apple (CA) "Fully equipped for a wireless world.". If you want to use a Mic for things like skype and phone calls, you can use a bluetooth headset. If you want to connect a Mic to record your singing voice, you can use a wired USB mic, etc.
That's not true. You can use your Mac without ever entering your credit card. But if you want to buy things from the app store, then of course you pay by credit card.
No, it's great. Buying software from the app store is just the beginning. It is also used to to inform you when your apps require an update. This is much more efficient than the usual way. Plus the app store has tons of free stuff too.
Wow you're really pissed! Sorry you had such a bad experience. I would have been happy to help you out. I have 3 macs on my desk + a macbook.
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Anyway, before anyone screams "Apple Fanboy", I also have a PC (Alienware Area 51 with Windows 10). It works well and is fast enough, but I find that I am much more productive on my Macs.