Has Ash vs Bishop vs David already been covered? lol
Prometheus has the most attenuated connection to Alien. Its not a real prequel. Its just set in the same universe. Not only that, Prometheus and Alien are almost entirely different genres when you compare them. I think that is the biggest reason some didn't like it. They wanted another Alien movie, and that is not what he was making.
Actually, I think the frustration is that we can't quite tell WHAT kind of movie he was making. Is it a space exploration movie? Is it a generic monster movie (e.g. an "Alien" movie)? The film can't really seem to decide which it is.
I liken it to Club Dread, actually, which can't decide if it's a serious horror film or a comedy. Sometimes blending genres works. In that case, it didn't. It was too horrific to be effective as a comedy, and too comedic to be effective as a horror film. Compare it to, say, Scary Movie or Scream, which are more 25/75 mixes rather than 50/50.
By the same token, we've got this weird 50/50 mix of monster movie and exploration movie, and the beats end up getting in each others' way. It's frustrating.
Anyway, as for the Ripley thing, I still think that the real issue is that she's not depicted as feminine, as much as she is depicted as female, and that's what Art may be reacting to.
I tend to think there's a difference between "strong female character" and "strong character who happens to be female." A "strong female character" often has "softening" aspects to their personality, to some extent related to sexuality in the sense of depicting them as a sexual being. A "strong character who happens to be female" really is just that: a strong character with female body parts.
While I don't think Ripley is wholly without femininity, her femininity is entirely beside the point and doesn't really come into play except in a very few brief instances. However, I don't think that makes her masculine (except insofar as one sees "absence of femininity" as inherently masculine).
The second film is a bit different because -- particularly in the extended version -- she shows sort of a maternal quality. What's interesting, though, is that this, in a way, again diminishes her sexuality. Aside from one momentary flirtation with Hicks, you don't get any sense of Ripley being a sexual being. She's a maternal figure, but that's it.
The third film is much closer to the first one, as I recall (although I've admittedly only seen it once or twice). Ripley is neither sexual (again, aside from one moment of flirtation), and is entirely focused on survival and then ultimately self-sacrifice. Note: I don't count the attempted rape as sexual, so much as being about her being a victim. That's power-related, not sexual. If it had been a skinny little guy (and remember, it's set in a prison...), you'd have the same effect.
Shaw, by contrast, is explicitly sexual in that she has a sexual relationship with her boyfriend. She's shown as being in love with him, and so on. That, in essence, is the "softening" element to her character which, I think, makes her appear more feminine. Actually, I think the fact that she has a friendly, loving relationship with someone adds femininity to her. Ripley doesn't have that, ever, except with Newt, or hinted at with other characters. In that sense, she's more of a loner, and that may be the aspect that makes her seem "colder." It's not that she's so much colder, it's that Shaw is a lot warmer. And perhaps it's that warmth that (A) makes her more likeable to Art, and (B) makes her seem more feminine.