Warren Gatland hits back at sniping from his Lions flanker Sean O’Brien

• Ireland forward had claimed a whitewash of the All Blacks was feasible• Wales coach rules out third spell in charge of Lions on 2021 tourWarren Gatland said he was hurt by Sean O’Brien’s public criticism of the coaching on the summer British & Irish Lions tour to New Zealand and revealed he would not be seeking the head coach’s position for a third successive trip in 2021 because there were times this year when he “hated” aspects of the job.Gatland was speaking for the first time since O’Brien made his remarks in a radio interview a month ago. The Ireland flanker, who started all three T…