This is a real thing. You're in there killing it, and from your peripherals you see these try-hard betas sneering at you or making the sour-puss faces at you. Clearly upset that you strength-mog, height-mog, and frame-mog them into oblivion.
Inb4: "I don't notice anyone else in the gym". You can't not notice someone that has so much hate and jealousy, and you don't even know them.
Their seething is intensified if sloots are around, too. Anyone else get this?