Gretchin are without question the strongest army in Warhammer 40k. People just refuse to admit it because it hurts their ego. Marines cost too much, Custodes fold to weight of dice, Knights are just walking victory points. A hundred grots on the table is the endgame. They drown the board, steal every objective, and laugh while your elite golden boys swing their shiny weapons at models that cost less than your morning coffee.
Every single grot is a hidden MVP. They force you to waste turns and firepower while the green tide wins on points before you even notice. Grots are not weak, they are misunderstood. The truth is that every other faction is a distraction from the real meta, which is filling the battlefield with angry barefoot goblins until your opponent has a breakdown.
Grots are the future. Everyone else is still stuck in the past.