Trouble was, Palpatine was a Sith Lord named Sidious...he was just too good at manipulation and Force stealth for anyone to see it. He wanted the Order gone so it couldn't oppose him getting all the power for himself. Luke destroyed the emperor, but some of his loyalists are still popping up in places.
That's where the two timelines get very different. Luke rebuilt the Order in our world, and although we're in the middle of of a war again, the Order is strong. Luke does things differently in a few places than the old masters, which is how he and I were able to marry, but he's graduated many of his padawans to knighthood and even some to masterhood.
Here, something went wrong, and the rebuild fell apart. I'm not sure what, but the Jedi are still all but a myth here.