Hi. I'm sorry you are frustrated, but you need to accept two things:
Apple sponsors this discussion forum, but does not participate. The participants are simply other users providing help free of charge. There is only one way to address Apple about Aperture, and that is via "Aperture➞Provide Aperture Feedback". That's "Aperture" on the Aperture Menu Bar.
Software is sold "as is". It should work the way it claims it will work. Your version of Aperture does. Savvy companies will attempt to keep up with changes that affect their products, but even the savviest cannot (and does not) guaranty that their software will work with future systems or future products. As technology is developed, the software must be developed as well -- that costs money. Eventually, the software companies charge for an upgrade or a new release.
Buying a digital camera today -- especially an advanced one -- requires you to have software and hardware that work with whatever you buy. To use your Canon 5D MK111 RAW files requires that you have (in the Apple ecosystem) Aperture 3. In turn, Aperture 3 requires that you have Mac OS X v10.7.4 or later. These requirements are not unreasonable. (And you can't plead indigence -- your camera is sold by B&H, body only, for $3,100 US.)
You can, of course, continue with your current hardware and software and record JPG files with your camera.