I’ve seen some people comparing the ST to as if Luke was Lincoln and abolished slavery, only to die and slavery return 20 years later. Wouldn’t that have undermined his achievement? That’s theoretically what happened with Luke and his Jedi Order.
The thing is, the people running the ST decided to make Rey become Luke (the last of the Jedi) and that basically means that Luke would have to fail rebuilding therefore failing to pass on what he learned therefore becoming a failure.
ST also undermined Han’s and Leia’s arcs, but only to a certain extent. Sigh.