Is this an Apple joke on PC users?

Question

I just learned that iTunes doesn't delete files if the folder is located outside of the iTunes folder (which happened because I used Creative before I bought an iPod). Meaning, I have of thousands (literally) of files sitting on my computer that are not being used, but will not know which ones they are without a file by file comparison.
So this is what I did:
1) Cut and pasted folder from one location into iTunes folder.
2) Went to "add folder" menu and chose iTunes folder.
3) Watched as appx. 5 gig of music turned into less than 2.5 gig.
After looking to see what the problem is, it appears that iTunes renames compilations based on artist and not album. No problem. But why then does iTunes not read the directory tree it just created? It appears that it only goes through one sub-folder.
For example:
An opera CD (La Traviata) list artist not as Verdi, but as the vocalist (or choir) that is singing. I look in the iTunes folder to see there is a folder named Luciano Pavrotti with a sub folder of Aida. But this chart is NO WHERE to be found in the iTunes library listing. I had to add this subfolder seperately. Again no problem, but there is TWO POINT FIVE GIG that would need this done, and no way to know what files are not added unless I compare the library listing, file by file, with a listing of files on the computer. Or, go through and add every single folder individually. Which would not be bad, except iTunes doesn't allow the for the selection of more than one folder to add at a time (i.e. pressing and holding <Ctrl>). Causing one to click:
<File><Add Folder>, expand iTunes Folder, scroll down, highlight folder to add, and finally click <OK>. Now repeat a few thousand times.
I feel there is little I can do, there really isn't even a question in this post. I just want to say that if this is the engineering on Apple software for something so simple as folder management, it is no wonder that PCs outsell Apple computers by a margin of 90 to 1. All because Apple wants one to use iTunes and Quicktime for default media players. Forcing customers to load music and video through these programs to gain any hope of competent folder management.

Answer 1

After much discussion back and forth between Apple and Denon, it was discovered that the Denon receiver does not support 1080p - only 1080i - this was not the information I orginally received from Denon.
Setting the Apple to use 1080i for the resolution, then configuring the Denon Receiver to use HDMI pass through for the HDMI output resolved this problem.