By Joshua Browne Manchester United boss Erik ten Hag has refused to take the responsibility for splurging close to half a billion pounds in the transfer market on disappointing signings. Antony, Casemiro, and Mason Mount are just a few players who have largely let fans down since their arrivals at Old Trafford, having been brought in for extortionate fees. Ten Hag has recently claimed he had nothing to do with the valuations of some high profile signings and has instead suggested ex-chief executive Richard Arnold and ex-football director John Murtough sanctioned the investments that have faile…