I felt the same way about The Godfather, after the diner shootout and when he flees to Italy it all became a blur and I completely lost track of what was happening.
I liked Terminator but not T2. Felt like it was trying to do too much with the first movie which, at the time, was little more than an action movie with primitive CGI. I actually think RotM is the best of the original "trilogy" even if it's no longer canon (fuck nu-Terminator though)
Alien is a great movie and I thought Aliens followed it up pretty well. However Alien 3 throwing Aliens into the trash within the first five minutes is a perfect example of how NOT to write a sequel.
Not an unpopular opinion here but my sister keeps trying to get me to watch all the new Marvel movies. After No Way Home (which I liked very much) I'm done with the MCU, they have used up or killed off all the characters anyone cares about and I am not going to watch a dozen other movies just to know what's happening in the new one. The last one I saw was the newest Doctor Strange which was incredibly disappointing, and that was also the last time I saw a movie in theaters. My own mother even wanted to see GotG 3 with me, even though she cares even less about the MCU than I do. Hearing my sister drone on and on about how good the new Spiderverse is is starting to annoy me, I've told her over and over again that I don't care about it anymore.