Come to think of it, I've not seen any of them (I've watched all including the earlier, disappointing Hulk movies) with anyone other than my kids. It's the shared experience with them. I think it is different for you because you're with them to give them a good time. I understand where you're at. The only difference is, for us, these characters meant something to us when we were the age of our kids. It just wasn't a thing for you, not then and thus not now and that's perfectly cool with me.
That said, I also think I know why you don't connect much. The amount of FX for what remain classic plots makes for great eye candy but not necessarily a great film. Here's a funny case, Jaws vs The Meg. The ever failing animatronic shark in Jaws forced Spielberg to take a less is more, Hitchcock like approach and the movie remains one of the best horror/thrillers to this day. Contrasted with The Meg, where othing is left to the imagination. Sadly bad CGI physics is so prominent it hurt to watch it. Just plain hokey. Super Hero movies, are extremely graphic. I can see where this could wear heavily on some viewers.