Golf Help- Are my old Hogan irons affecting my game enough that I should invest in new ones?

I finished an awful round of golf (123) and was walking off the course when one of the employees gawked at my set of irons. I have an old set of Hogan edge irons that he said would only be used by single digit handicappers. It said those clubs were very unforgiving and would deff affect my game. Is this a case of the equipment really being in fault or is it not really that big of a deal? Im now considering if i should invest in new irons