Hey man, I'm willing to go to bat for Alien 3. It's like a coherent movie that has themes and character arcs and shit, rather than the crassness of Resurrection and the totally undercooked and jumbled Prometheus. Its a pretty good meditation on coming to terms with death, and pretty much every action and line in the movie relates to this. Characters have dialogue that sound like a human being wrote them, and in some cases is really excellent (Dillon and Charles Dance's characters in particular are excellent). The setting is evocative and well developed with its own intriguing culture, and again helps develop the theme of the movie. Ridley gets a satisfying, if a bit melodramatic, conclusion that fits the tone of the series. The cinematogrpahy and production design is fantastic, infusing a gothic medieval atmosphere into the death focused story helps make it far more effective take on religion in the Alien universe than Prometheus' "maybe Jesus was an Alien??". The score is arguably the best in the series, and it's got some great performances.
The alien stuff itself is pretty bad, as there's no tension, it's edited poorly, some of the secondary characters are indescernable, and the composting makes it look goofy as fuck...but at least there's a consistent sense of tension and progression of the threat as opposed to Prometheus's Daisy Chain of disconnected monstrosities that are born through illogical acts and and never feel like credible or developed threats. That's the thing about Prometheus, it just feels so random. Characters are so incredibly inconsistent, plot developments feel like they were picked out of a hat, and dialogue sounds like it was pieced together by an AI trying to write a screenplay.
Resurrection doesn't even have the advantages of looking good or having Michael Fassbender (the sole redeeming elements of Prometheus). It's the least funny comedy ever, and it looks like it was smeared in Vaseline. It's ADD to the point of being obnoxious, and mostly just makes me feel kind of queasy.