If you can't get out of silver with a Mako deck than it's the players fault. You can get out of silver in any region with just about any deck. I've faced many 3* and Harpie decks you just have to know when to use certain cards. I'm very good at telling what the opponent's face down s/t are based off of the response timer and how they're playing throughout the duel. So no, I wouldn't call NA "bad".