If we started with a balanced side and the manager made subs when needed things might have been different, but instead he stuck with Plan A, which was a terrible plan and he kept with Plan A for 90 long minutes despite it not working at any point whatsoever at any point in the game.
Its basic management and its worrying that he keeps doing it, trying it once is forgiveable, trying it twice is taking the piss, but when it happens for the 5th time, then some serious questions need to be asked, by somebody.