I definitely understand your frustration, but it's no reason to discount Apple entirely.
HOWEVER--their customer service in recent years seems to be less than it once was. I had a Powerbook 5300cs back in the 90's that I dropped on a cement sidewalk. My fault, pure neglect.
Apple replaced the display and the upper housing in 4 days flat, no questions asked.
That sold me on their laptops.
However, my last Apple laptop was, without a doubt, a lemon. In 4 years, I had:
Multiple keys detach until Apple finally replaced the keyboard
2nd keyboard replacement because of stuck mechanisms
Dead pixels on the screen I was repeatedly told by an Apple store "genius" that Apple would not cover
Damaged, lighter areas of the screen where an InCase backpack apparently didn't protect the back of the display from the notebooks in the backpack
Display finally replaced after many trips to the Apple store, only to have the backlight fail a few months later
Hard drive failure
Weird, undiagnosed issue where the computer could not find the startup disk
Freezing problems and Kernel Panic so bad that Apple finally wiped the hard drive to try and solve the issue
Repeated hardware-related Kernel Panics, several related to the faulty upper RAM slot I now understand Powerbook G4's have an issue with
Trackpad failure and replacement
Now, I'm not gonna lie here. I beat the crap out of my laptops. I expect it to work, or be fixed. And all those headaches aside, Apple really has taken good care of me over the years. I'm convinced the Powerbook G4 was a lemon, but they covered it well past the end of my Applecare warranty.
My girlfriend is now using it--more gently--and it seems to be doing fine.
You have to realize, computer hardware is not perfect. Failures are possible. Lemons are possible. What matters is that Apple will take care of you, even if you have to call the 1-800-SOS-APPL line and send in your machine.
I know it's frustrating, and for a while there it seemed like my computer was failing every other week. I believe Apple should have replaced my machine with a refurbished model. I actually asked them to replace it, both through the general manager of the store I bought it at, and directly through Apple via the 1-800-SOS-APPL line multiple times, and was either outright laughed at, or told "well, we don't consider these issues major failures, so if it happens again..."
But, even after all that drama, I still got suckered into buying a MacBook Pro and am loving it. What can you do.
My other two machines ran flawlessly right up until the end, save for some minor cosmetic issues that cropped up in the 4th or 5th years of use. I'm hoping the current MBP will follow in their footsteps rather than the lemon's.
Wow, most of your issues can be bunched together...
All most likely due to a crappy 3rd party case.. as the increased pressure also screws with the keyboard.
Damaged, lighter areas of the screen where an InCase backpack apparently didn't protect the back of the display from the notebooks in the backpack
Display finally replaced after many trips to the Apple store, only to have the backlight fail a few months later
Multiple keys detach until Apple finally replaced the keyboard
2nd keyboard replacement because of stuck mechanisms
Trackpad failure and replacement
Hard drives fail like no other, probably caused the Kernel Panics/Unable to find disk, and I'm sure the memory slot didn't help either..
Hard drive failure
Weird, undiagnosed issue where the computer could not find the startup disk
Freezing problems and Kernel Panic so bad that Apple finally wiped the hard drive to try and solve the issue
Not really a lemon, you just abused your laptop a lot..