The problem is likely not getting worse; it's just that instant replay has gotten a lot better, so the viewers see things they didn't see decades ago.
That said, I still find it baffling the league doesn't implement the solutions people are mentioning here. The Competition Committee tweaks rules every off season, why not look at how referees are hired, trained, paid, evaluated, and, in the game itself, overruled when they make egregious errors?