I literally had a chat with a guy who said that all GX decks wouldn't be good and just flop, and here we are, with a tier 0 deck. More of a F2P meta nonetheless. This is what many F2P players have been wanting, in a way.
GX would be decent on their own, issue is the decks came out with support from way later (5D's to ARC-V), making them obviously overpowered in comparison,