

Personally, I’d argue that Alien and Terminator weren’t amazing either, and it’s only Aliens and Terminator 2 that were actually great movies. They’re still franchises with one really awesome installment followed by utter trash. And honestly, I think I’d take Jurassic Park 3 and Jurassic World over anything else the Aliens franchise has produced since.
I’m not saying they are definitely worse than the JP franchise, just that they’re close enough that reasonable people could disagree.
They aren’t bad movies, just not great. Better than Lost World, but not so good that I would be lamenting the terrible sequels if it weren’t for the far superior installments.
All I’m saying is that there isn’t a hell of a lot of difference between being disappointed in the terrible sequels that came after the first movie vs the terrible sequels that came after the second movie, especially when you aren’t all that attached to the first movie.
It’s all a matter of perspective anyway. Yes, Jurassic Park never got a good sequel but then it never really needed one. It was a complete story that did not call for any kind of follow up. To me, that makes the sequels less disappointing, because I don’t expect anything more.
Aliens ends with unanswered questions and lots of obvious potential for follow up stories. Star Wars gave us an entire universe full of potential stories to tell, whether it followed directly from the original trilogy or did something new in the same world. That the potential is wasted by making terrible movies makes them so much worse to me.