Disney was only responsible for two sequels (Rogue One and Solo are anthology series and thus don’t actually count as part of the mainline films, so they don’t even count as ‘quel films.). Lucas was responsible for making sequels and prequels after A New Hope, so blame him for that, especially when back then Disney didn’t even own the rights to Star Wars. Now, that being said, Disney DEFINITELY did badly with the Sequel Trilogy thus far.
The first one was classic and is really the only one.