Here is QT's quotes from a playlist article on Lone Ranger:
"The first forty-five minutes are excellent," Tarantino stated about "The Lone Ranger" before conceding, "...the next forty-five minutes are a little soporific. It was a bad idea to split the bad guys in two groups; it takes hours to explain and nobody cares. Then comes the train scene—incredible! When I saw it, I kept thinking, 'What, that’s the film that everybody says is crap? Seriously?' " So far, so good, but then the helmer gets into what didn't work for him."
"That being said, I still have a little problem with the film. I like Tonto’s backstory—the idea that his tribe got slaughtered because of him; that’s a real comic-book thing. But the slaughter of the tribe, by gunfire, from the cavalry, it left a bitter taste in my mouth," he said, continuing: "The Indians have really been victims of a genocide. So slaughtering them again in an entertaining movie, Buster Keaton style… That ruined the fun a bit for me. I simply found it…ugly."
"Making fun of this, when America really did it, it bothered me...That doesn’t stop it from being a good film but they could have done without that," he added.
When the interviewer points out that "Django Unchained" had its fair share of gruesome depictions of slavery, Tarantino offers up a slight defense. "I didn’t make 'Lone Ranger'…that’s two different things. I did an examination of America. I tried to juggle with different things and, frankly, I think I did it better than them," he said. "I don’t know, let’s just say that it was ugly. And violent. And boring. And it happens right in the middle of the film’s bad part, anyway. [laughs]"