Megadeth's 2004 'Youthanasia' reissue is like this. They quite literally just went in and slid everything up to max. Fucking unlistenable.
I also love when the remaster consists of swapping the panning and nothing else. "Now the lead guitar is 22% to the left instead of 22% to the right, that'll be £15 please".
The Ozzy 2002 releases where they not only slammed the ceiling with the mix but re-recorded tracks, yuck!
I may have gotten two of those when Ozzy had died and I felt like adding them to my collection. I immediately felt like something was wrong with them.