He put the boot in again on Friday with a Twitter post, stating the World Cup pool phases were “boring”. STU FORSTER/GETTY IMAGES Ireland’s Joey Carbery (L) is dejected as Japan celebrate an upset win. I’d get hammered for this, and it’s absolutely not meant as a shot at rugby as the quarter-finals onwards will be good. But man is the World Cup boring. Seriously. A month of pointless games you could have almost entirely predicted 15 years ago to whittle nine down to eight. — Ewan MacKenna (@Ewan…