What you have to consider with arsenal is that considering they are a champions league mainstay, top 4 in the premier league, have some world renowned stars in ozil and sanchez, highly rated manager in Wenger, brand new massive stadium.
Where does all the money go? they don't spend much money compared to other clubs, if they go big they normally only bring one or 2 in that window rather than splashing the cash. All the money they make must go somewhere.... and a cut of it surely goes into the shareholders profits.
So as long as arsenal are making money for Kroenke, why would he care about real success which would cost him money?