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!

For an opposite example, the remaster of The Satellite Years by Hopefall took what was a muddy and genuinely terribly-mixed album and finally cleaned it up, letting that masterpiece of an album finally shine through!

Not metal but Michael Jackson's "Bad". The original CD master sounds much more relaxed and dynamic compared to the current master used on Spotify, Qobuz etc.

I know this is a bit older post and Rammstein is quite light in the metal department, BUT I almost drove into a ditch once when I was listening Herzeleid while driving and realized that the album in Spotify had been "swapped" for a remastered fucking yucky version over night and without any notice or them writing clearly that it was a "remaster". Such clean, dry, soulless, empty yucky fucking mess. Almost ruined the OG album for me. I like the original because they can't play for shit yet, it sounds real.