Distiller just locks up when you print, thus locking up the rest of the application that printed it. You have to wait for the time-out period (like 5 min) before the thing realizes it sucks and then cancels the print and returns control to the program.
The reader takes over a second to load. That's unacceptable for a reader. Even a writer! Word takes less then half the time. I could load Word, Excel, and PowerPoint all before Acrobat loads, and Acrobat does NOT have any where NERE the functionality of those other apps (I am not saying those apps have much functionality ether).
I have come across documents that take literally 15 seconds to render.
Scrolling causes huge redraws which take FOREVER to complete (especially for those 15 second documents).
The only two reasons one would EVER use Acrobat would be if you need precise control over print out, or if you need complete control over layout. Otherwise, HTML would be MILLIONS of times better in every way for every situation. Hell, even JPEGs would be better.
Acrobat some how makes people think scanning in a document then putting them on the web should be done as PDF instead of ? ANY OTHER FUCKING IMAGE FORMAT! (And I do mean fucking formats, those are the best)
The interface is HORRIBLE! (Notice a trend?)
There you go; my reason why Acrobat is completely worthless.