The Tragedy of the Mobs Add-on 1.21+/1.20+

Mod The Tragedy of the Mobs significantly complicates the gameplay of Minecraft. Hostile monsters will receive various enhancements, not only adding new challenges for the player but also causing severe suffering during attempts to defeat these mobs. If the add-on doesn't make you cry, at least it will lead to a nervous breakdown.

Changes
Mobs will receive 44 additional hearts
Each creature has increased strength and endurance
Additionally, there can be random effects
Monsters will be able to break some blocks
Equipment will become even better
Also, creatures have gained new abilities