Yes, you are right England wonderful batting and bowling performance in 3rd ODI match of series and winning the match by seven wickets. England whitewashed west indies by winning all three matches in this series. West indies disappointed performance throughout the series they didn't bat well and also failed in bowling. In last match Sherfane Rutherford played a responsible inning of 70 rus from 71 balls they played run a ball inning that reached west indies total 250 plus. The man of the Match is Jamie Smith for his aggressive batting performance scored 64 runs from just 28 balls with an impressive strike rate of 220 plus and assited England to win match. West Indies needs to improve his bowling units because their bowlers didn't defends total even they didn't defend 300 plus total in second match of series.
West Indies were just plain bad throughout series in batting and bowling and it cost them big time. In last game Sherfane Rutherford played decent innings of 70 runs which helped them get over 250 runs but it still was not enough against England team.
Jamie Smith really stood out for England hitting super fast 64 runs off only 28 balls. And he deserved Man of the Match reward and he showed how aggressive they can play and how easily they can chase down scores. You are right to say that West Indies bowling is huge problem. They could not even protect big scores like over 300 runs in the second match. They really need to get better at bowling if they want to stand chance in international cricket.