I feel for you. I'm also an extremely unlucky individual when it comes to tech. My first apple purchase was a white, unibody macbook which when starting up, depending on which angle the screen was bent, the airport card would show up as not installed. So I had to restart the computer with lid completely open for the airport card to show up as installed. Weird. So I took it in, Genius guy said it sometimes happens, they would fix it, but I scheduled to drop it off the next day as I needed to back up. Ended up not getting it fixed as it stopped giving me trouble. It's been a year now. While in the store, in the hands of the genius guy, he bumped my laptop against a macbook pro, and scratched the white lid badly.

And my white unibody macbook also is a little misshaped. When it is completely closed, the lid in the back does not close completely level and as the same length as the bottom.
Second purchase: iPad 1. Also had issues with Wi-Fi. It would not work anywhere but my home. It was absolutely perfect, no dust, no scratches, nothing, except that it was useless outside of my house. I took it into an apple store, it worked there exceptionally well, but the genius guy believed me anyway and exchanged the device for me. I saw him open the box of a new product and hand me out an iPad. I left the store jubilant about how apple truly is amazing. I get home, remove the plastic around the new iPad, and look at the thing's back - and there it is. A 2cm scratch. Beyond that. Product is perfect.
Bought an iPhone 4 refurbished from ATT. It came with a 2 year applecare plan already on it. Called apple to question this and they transferred the plan under my name.
Two weeks ago I went to an apple store to buy the updated airport extreme. I asked the seller if it was compatible with time machine. He guaranteed me yes. I get home and set the whole thing up, and time machine cannot find the connected hard drive to the airport extreme. I spent about 2 hours following guides on how to make it work; it eventually did, but it would always fail. Called apple and was told this feature was NOT supported on an airport extreme, and if I wanted this I would have to purchase a time capsule. For $100 more. $300 for a router with a hard drive? I don't think so. That's when I hung up. Next day on my way to work, went into another apple store, returned the product and filled up my survey online. I already got a call from a rep wanting to discuss my experience and what they can do to make it better. I didn't call back.