All the above is correct, but the real blow to the Amiga (and Commodore as well) was the game machine image that it held. Too many people had no real respect for the machine and company. And not just because of the gaming image, but also due to the price. It was too low for a "real" computer. Also, schools expected discounts like they got from Apple, even though comparable Commodores were priced lower than Apple's discounted price.
I could rant and rave as I sit here with an Amiga 4000, another 4000 with a Video Toaster, 2 A2000s, an A1000, an A1200, an A600, and about half dozen A500s, all boxed up here and no place to play with them.