When Steven Gerrard finally guided Rangers to a long-awaited 55th league title, the sun was certainly shining. But Douglas Park, the Rangers board and everyone else in the background at Ibrox appear to have blew the chance to fix the roof before the rain came. Now, Rangers are on their fourth manager in less than four years with Gerrard’s exit coming off the back of a static approach to the transfer window from the Ibrox hierarchy and the skies have since opened up. And if the Ibrox shareholders felt that investment in the summer of 2021 was going to be costly, years of transfer failure has ju…