I'm with you. I think most of the star wars movies are pretty bad, but some of them are pretty good. And the bad ones don't make me feel worse about the good ones.
I think there has been a serious cultural shift in this regard sometime during the 00s. Most people used to understand that sequels are generally shitty and didn't make a big deal of this. S-tier classics from the likes of Disney used to get shitty straight-to-DVD sequels (e.g. Lion King 2) and nobody even thought to whine about it. Even movies that had very well received sequels would sometimes receive further sequels that were stinkers, and nobody started ranting about how the original was ruined because of it.
Alien and Aliens were great, then you got Alien 3, AvP, etc.. a bunch of mediocre slop to put it nicely (actually I like 3, but I admit it's deeply flawed). But when did you ever hear somebody say that AvP or Alien Resurrection ruined how they felt about Alien or Aliens? Terminator and T2; great movies that got a bunch of shitty spinoffs and sequels, but nobody said at the time that their enjoyment of the first two was ruined by what followed. James Bond has been a rollercoaster of quality for decades but it keeps going and fans enjoy calm respectful debates about which are their favorites. The Godzilla franchise has lots of quality interspersed with lots of crap, I don't hear many people saying that the horrible Minilla retroactively ruined King Kong vs. Godzilla, or for that matter, that King Kong vs. Godzilla ruined Godzilla (1954). The first Jurassic Park wasn't said to be ruined by the cashgrab sequels. The Land Before Time is still warmly remembered, despite 13(!) direct-to-dvd sequels.
Even in the early 2000s, I heard a lot of people saying they didn't like the Star Wars prequels, but I didn't hear many people saying the first three movies were ruined. Not until a few years later did this attitude start to find traction.