As the game stands, Cyborg vs Grundy is a 10-0 matchup if the Cyborg can do IAFBs at all, doesn't even need to be blockstun-infinite tight. The hitbox for swamp hands is incredibly low and it will always whiff on a cyborg firing IAFBs. He moves too slow to chase down the grapple even if he does manage to get through. I haven't lost to a single Grundy online and I have over half of them rage quit on me because they literally can't do anything. I've even started warning them at the character select screen to pick someone else or it'll be very unfun.