We have had a worrying habit of slanting our purchasing policy towards buying players from relegated / persistently relegation threatened teams, players whose time was up at Utd, and promising youngsters this last few years.
Relegation fodder:
Pickford
Williams
Gueye
Siguardson
Keane
McCarthy
Robles
Kone
Utd rejects:
Schneiderlin
Rooney
Kids:
Dcl
Lookman
Oh, then there's the utter crap (Cuco). Add that to our ageing former reliable stars it's no wonder we're turd.