Basically mate.
We saddled ourselves with an insanely high wage bill, by signing the likes of Sigurdsson, Schneiderlin, Bolasie, Sandro, Walcott, Ashley Williams, James Rodriguez (who doesn't want to play - so is included), Rooney to insanely high wages, which subsequently meant they had no ambition to ever leave and then spent millions which is now coming back to bite us on the arse, as signing mediocre players, with high wages who are exitting their peak years, usually means we get no resale value, to reinvest in the squad to the point that we're all crying until our soon to be 33-year old Right Back returns, because we have no right backs, despite years of warning.
Basically, a delightful cocktail of Steve Walsh and Koeman doing their best impression of a Bull in a china shop, Moshiri spending like a drunken sailor, and Brands being so incompetent that he couldn't even sign a receipt at the tills at the shop.
All together, means we've got a bench where Johnjoe Kenny makes an appearance at 3-0 down.