Honestly, ESB’s Special Edition wasn’t horrible at all! A lot of the changes were actually good, such as actually seeing the Wampa creature, changing the walls in Cloud City, and getting Ian McDiarmid to portray the emperor. Overall, ESB was the only movie who’s Special Edition changes were good.
I actually like the new Victory Celebration in Return of the Jedi.
And also, that one scene in Star Wars where Han chases down Stormtroopers in a hallway.
The original version has a dead-end, but the Special Edition, where he comes across an entire docking bay full of Stormtroopers is much more hilarious. Both scenes were great, but the Special Edition is even better for that scene.
Star Wars also has that restored Biggs scene which is really nice.
I also like some of the less-noticeable fixed VFX. Such as that one matte painting near the end of Star Wars showing the Rebel Army. The matte painting effect looked really off in the original. But the Special Edition fixes that by digitally compositing in more realistic people (not sure if they were live actors or CGI) that fit in better than the original matte painting.
The spiced up CGI shots in the Battle of Yavin were also really cool and more dynamic.
The new recomposites and colour grading made for the 1997 release are also much better. The '97 colours are the best the films ever looked. The 2004/2011 colour grading, however, was awful. The 2019 version is much better, but not as good as the 1997 colours.
All in all, each version has their own pros and cons. But I mostly just stick with the original versions to make things simpler. That or the 1997 print.