Alien 3 is fine but it’s mostly just a retread of the first film. I don’t take anything away from it that I didn’t already get from Alien. There’s no attempt to bring anything new to the table.
Alien: Resurrection completely falls apart when the Newborn appears, it’s true, but the first 2/3 of the film are really strong. The bit where Ripley finds the clone room is brutally dark and the group of Pirates are a great collection of individual characters. Ripley’s character too, is now clearly changed by her new xenomorph DNA. And overall, there’s definitely an attempt by Jeunet to subvert the film with black comedy.
For me I file it alongside Die Hard with a Vengeance: a great film until a completely terrible final act.