To be fair, bulletsponge enemies aren't inherently a bad thing, provided they look/feel like they deserve to be bullet sponges compared to the player and their weapons.
Dark Souls and all its clones? They do this terribly because you might look like a badass, but any shambling zombie enemy can assrape you to death in a few hits, while you'd better spam that attack button for 2 minutes straight just to kill one of them. God help you if there's more than one.
STALKER? Makes sense, you're dealing with either normal humans wearing body armor, or mutated abominations that are almost purpose-made killing machines. So some enemies (like Exosuit-wearing humans or Burers and Pseudogiants) being bullet sponges makes sense.
Halo? Yeah, Hunters and Sangheili Generals & Zealots / Jiralhanae Chieftans & Weapon Masters are going to be bullet sponges, they're the toughest aliens you'll face in the games, given they're basically the Covenant's version of you (battle hardened, decades-old troops with the best armor and weaponry available).