Palpatine did get his revenge and the entire Skywalker line failed and died.

Han and Leia had one son who died, Luke didn’t pass on crap except in Legends canon where he had a Son.

Take away Rey the adopted Skywalker and it isn’t really about the Skywalkers at all.

Anakin’s such a great chosen one he didn’t even kill Palpatine and end his reign, and his son turned out to be a failure by any standard, didn’t restore the Jedi. Even his daughter failed to restore the Republic.

Its all there except for the hope that Rey, Finn and Poe, aka the next generation will fix the last generations mistakes. Fulfill their hopes and aspirations.