Who is "we"? There are plenty of people who watched the OT when it came out and loved the prequels. If ROTJ came out today people would think it was godawful.
People have ALWAYS though JEDI was godawful, because it was and is.
It's just that the prequels suck worse, except maybe 5 minutes or so of SITH.
Still hasn't been a decent SW movie since EMPIRE IMO. Gary Kurtz is what brought balance to the Lucas, and w/o him it has been a lesser thing.