About the only quotes from Scott about the sequels I could find over the years
""Theres also no question that Cameron made an excellent film with Aliens. It really is an achievement" (Alien: Illustrated Screenplay) (he also mentions in the same source that he thought they were too many aliens overexposuring the creature this way and that the queen was a very good idea)
""It's always tough to follow a successful film with a sequel to it ... It could never be as frightening [in the sequel] because you've already seen it. Therefore, what I think James Cameron [did with ALIENS] was a terrific action-picture. It's difficult what he accomplished"
"I would never ever critique or criticize Aliens because I think it was very successful and what he did was really good" (Jake Hamil int 2012)"
About the only closest thing I heard Scott saying about Alien 3 would be those sources:
"Alien has since been subjected to the ignominy of three sequels.. Of these, Scott (and everyone else) prefers the first: James Cameron's Aliens (1986) - independent.co.uk introduction before an interview with Ridley Scott"
Lindelof:" I can guarantee you that many times over the intervening years, he [Ridley Scott] was aware of what was happening with the Alien franchise. And his silence on those movies, with the exception of Aliens, which I think he is a fan of and I know he’s also a huge Fincher fan, but post-Alien 3 — both Resurrection and the Alien vs. Predator mash-ups, I think Ridley’s feeling was, It’s time for me to now take the reins and put the ship back on course"
I know when doing interviews for Prometheus Scott didnt even remember anything about Alien 3, he said "One was set on a prison, wasnt it?". Doesnt sound like he cared much for it