You're suggesting that this season would have panned out differently if Jose was given extra funding over the summer? Possibly, but only if we could absolutely certain that these extra additions would not have been duds. Let's be honest here, his strike rate regards transfers has been abysmal since taking over at United. He has spent £400 million on new signings and not a single one could be classified as a definite success. Put yourself in Ed's shoes, would you trust the guy to get it right this time around?
Also, Jose falling out with Pogba, Martial, Valencia, Sanchez, Woody and the ever-present war with the media has most certainly had an adverse effect of performances too. Jose is accountable for so many problems within the club right now, both on and off the field. It's a miracle he is still in charge.