TheBoost said:
I'm not certain that thinking the character is a not so bright necessarily translates as a slap against the movie.
It's the interview as a whole, not that quote in particular. But I'm not sure it's a matter of Ford "not getting it", so much as being bitter at being personally tied to that character much, much longer than he would have preferred, with audiences (and interviewers) never ceasing to gush over it.
Heck, if I did fantastic work at a job I despised, and people couldn't stop talking to me, even decades later, about how great that job was, I'd do anything I could to change the subject too, including sounding like a bitter grumpy old man if that's what it took.