England's one day bowling attack is desperately poor, great potential in the batting line up but not one of the bowlers is good enough for that team to win the world cup. You could maybe, maybe get away with a couple of them with world class bowlers in the team but we don't have that, and the team continually struggles to get wickets as a result and quell the flow of opposition runs. Whenever England win one day games its almost always by batting the opposition out the game or chasing a big total.
I mean look at the attacks list A bowling averages from yesterday:
Ben Stokes - 28.51, economy 5.64
Jake Ball - 28.79 economy 5.60
Chris Woakes - 36.46 economy 5.57
David Willey - 33.02 economy 5.61
Moeen Ali - 42.87 economy 5.35
Adil Rashid - 31.61 economy 5.35
Most of them don't even have good List A averages by county level let alone look like cutting it internationally. Even the couple that do, Stokes bowling has been terrible in limited overs for England, though he's at least a powerful batting option too. Compare that to say the averages of the Australia team and you see how desperate our bowling is. Australia, South Africa, New Zealand, India and Pakistan all have substantially better bowling line ups than us.