It's not "rubbish"..whether you think he "bowled well" or not it's simply the facts that in four of his last five series away from home the lad hasn't really done much. And his most recent away tour was against the 8th ranked team where even Tino Best looks like Macko!!...but Trent flopped.
Roach's overseas record:
West Indies in England, 2012 -- 8 wickets at 34.25
West Indies in India, 2011/12 -- 2 wickets at 53.00
West Indies in Bangladesh, 2011/12 -- 1 wicket at 101.00
West Indies in Sri Lanka, 2010/11 -- 10 wickets at 24.50
West Indies in Australia, 2009/10 -- 7 wickets at 51.00
So one good (<30) performance in SL, one acceptable (<35) performance in England, he flopped (>50) in India and Australia and was utterly useless (>100) in a stunning twist of irony/coincidence, Bangladesh!
Boult's overseas record:
New Zealand in Bangladesh, 2013/14 -- 3 wickets at 58.66
New Zealand in England, 2013 -- 8 wickets at 20.37
New Zealand in South Africa, 2012/13 -- 4 wickets at 46.50
New Zealand in Sri Lanka, 2012/13 -- 9 wickets at 15.11
New Zealand in India, 2012 -- 5 wickets at 49.40
New Zealand in West Indies, 2012 -- 4 wickets at 26.00
New Zealand in Australia, 2011/12 -- 4 wickets at 20.00
So he was gun (<20) in SL, good (<30) in England, Australia and West Indies, mediocre (35<x<50) in South Africa and India, and flopped (>50) in Bangladesh.