I would argue that The Force Awakens destroyed everything that happened in the Original Trilogy and ROS just made it worse.
In TFA, the New Republic essentially failed and a new empire (First Order) filled in the same space terrorizing the galaxy. Han turned out to be a deadbeat dad and husband who abandoned them when shit got hard. Luke abandoned the galaxy with little to no explanation. Leia is still leading a resistance/rebellion into her elderly years because apparently few young people have taken up the fight. And a new big bad apparent Sith is now going to destroy planets with a giant superweapon. So the big happy ending at the end of Episode 6 is ruined because they really didn't make the galaxy better after all.
The Last Jedi makes that story worse because it turns Luke into a shittier character, it makes it seem like the entire Galaxy doesn't even care anymore, and it makes the First Order oddly more powerful, but somehow less competent.
And the new ROS just shits on everything by making the Emperor never defeated at all. And instead of the master of working to gain power behind the scenes, now he's extremely stupid by announcing to the galaxy he's back before he has his fleet deployed. Nevermind the ridiculousness of a giant fleet of planet destroying Star Destroyers not being able to fly without some other antenna directing them or shields not working in an atmosphere...
The last movie in a 9 movie series left way too many questions that are just stupid to not explain. Was Palpatine against the First Order? Was he controlling them? Was his fleet going to combine with theirs? Who built this fleet of hundreds if not thousands of giant ships and who is manning them and keeping them supplied in secret for 30 years? Who the hell did Palpatine screw to produce children, nevermind grandchildren? What happened to the force sensitive kid with the broom? Wait, so Force Ghosts can interact with real world physical objects now? Seems like that might have been useful in the past... The Force can now heal wounds? Again, seems like that might have been useful. Oh, the Force can now stop literal starships in their tracks either just by Force Pulling or Force Lightning that disables their power? Seems like the Emperor might have used that to stop the Rebel Fleet in Episode 6... Or maybe forget the stupidity of not shooting it, Darth Vader could have used that power to grab the escape pod from Episode 4 instead of letting it get away. So many new Force abilities that break the previous movies for absolutely no payoff.