A recent patch has nerfed Shadowlands dungeons and raids. The balancing changes have made it easier to complete end-game content in World of Warcraft.
Bosses, mob damage and health in the Necrotic Wake, Sanguine Depths, Plaguefall and Spires of Ascension has been nerfed, along with the addition of some quality-of-life improvements.
The Stone Legion Generals in Castle Nathria has also been hit with a nerf, reducing damage from the encounter.
See the official post for the complete list of changes.