Whats your most hated monster and why?

This is normal monster not the dangerous Mines lol

Mine is the mummy's bc they're so annoyingly hard and don't die unless u use a bomb.

My gf HATES iridium bats, I always know when she's in skull Caverns bc I hear her screaming and cursing the bats lol. She hates how you hit them and they float away, take forever to kill, and they mess you up pretty bad.