For me the Last Jedi was the one that "ruined"* Return of the Jedi (ESB and ANH), pretty much just completely shat over and betrayed all of Luke's narrative, characterization, growth, and story arc. So much that it actually has effected my desire to view, and the way I see the OT.
The one that somewhat comes close at DC to tainting a whole past generation of story and characters, was Identity Crisis, but that one has become pretty easy to ignore.
*Just so this doesn't become a derail, this isn't about Rey, Fin, Poe and new characters, I absolutely love them, this is about how Luke was (mis)handled.
I would have thought so too. And intellectually I can easily separate the two, yet there is still a deep visceral emotional impact, that does effect how I view the previous stories.