Most annoying? Hm, I wouldn't call it annoying, but the hardest to avoid is GA's unblockable reset super stuff. I'm actually not evne sure what you're supposed to do beyond an invincible wakeup or backdash, and that doesn't always seem to work. Could just be my timing or something though.
Solomon Grundy. Everyone else gets one chance to land their super, and if they don't that's that. Grundy? He gets several seconds to try and to grab me. Why does he get giant window? What makes it so special?