Personally, I'm not following your logic concerning this issue. If I understand correctly, the key concern is software compatibility. Though forum members have offered suggestions on work arounds, including free office suites that would very likely address your Word document issues, you haven't indicated that you've tried any of these.
Granted, I have to agree that MS dropped the ball on WIN 8. By essentially not providing end users enough clear, and easily accessible built-in instruction on a radical change in their user interface. Obviously, a not very well thought out approach by essentially saying here's the new WIN 8, now go figure it out for yourself? IMO, MS relied too much on an assumption that users would feel comfortable with the new interface, due largely to the popularity of touchscreen based tablets and smartphones. While the vast majority of existing desktop and laptop hardware don't utilize touchscreens, to which the new Live Tiles environment is best suited.
Much of this confusion and frustration could have been avoided had MS just provided built-in options for the end user in the first place? Allowing one to select/switch between the traditional WIN interface, and the new Live Tile based system. At minimum, to allow users to get comfortable with such a radical change. Or stay with the traditional interface if one chose to do so. Obviously, after market apps like Classic Shell proves that it could have been done.
I personally prefer using a combo of mouse and keyboard commands in both Windows and Mac OS. So didn't experience much of the frustration maneuvering around the new interface.
Did you ever try using the ESC key as a back button in WIN 8? Or the Windows Key to get back to the Live Tiles home page? How about Windows Key+E for My Computer(Explorer)?
Notwithstanding, virtually every OS upgrade involves hardware/software compatibility issues, if not requiring minimum upgrades to both, just to be able to use a new OS. This is not just the case with Windows.
Bottom-line, if you don't want WIN 8, then just install WIN 7 on your new laptop. It would be cheaper than spending more $ to fix an older laptop. Especially, since a new laptop would likely have updated hardware, not to mention a warranty?