I know what you're saying. Star Wars used to be cool, and now it isn't cool anymore.
There would only be one way to change it. No Star Wars movies for 20-30 years. No rereleases, no TV broadcasts, nothing.
Then, restore and release the original versions of the trilogy restored in Blu-Ray and on 35mm film.
That would get a whole generation hooked, the prequels would be forgotten, and Star Wars would be cool again.