Spider-Man is part of *a* Marvel universe. Just not the one you've decided to talk about, for some reason.
Yeah, it's a mystery why anyone would talk about the Marvel Cinematic Universe after a reference to a film in the "Marvel universe".
To what end are you making this distinction? He was was clearly talking about Marvel movies as a whole.
So far 2/3rds of the respondents have assumed he was talking about the Marvel Cinematic Universe, which is a not at all arbitrary distinction and logically related to both his topic and word choice, and 1/3rd have not. So, maybe his intent wasn't so clear as you make it out to be...or it was, but not how you took it.
Like people talk about, say, British movies, or gangster movies, or Bond movies, or Spielberg movies.
Or superhero movies, or comic book movies. Unfortunately, he didn't say any of that. He said "best film in Marvel universe".
All of which involve multiple studios or directors or actors or caterers. If I say I didn't like many recent Spielberg movies, is it really necessary to jump up and point out that some of them had a different boom operator? So Fox provides the money for some of them, and some other studio provides the money for some others. How does that affect his point in the slightest? He didn't like some recent Marvel movies, whoever did the catering.
Neither the caterer nor the boom operator are analogous to the studio, which provides direction and focus to the film line as a whole. There are at least three "guiding" factions in superhero movies today - Marvel, Fox, and WB. If OP wanted to conflate them under the umbrella of superhero movies that's one thing, but his phrasing and word choice suggest otherwise.
Edit: And just to be clear on my intent, I thought he should address his feedback to the appropriate parties. If he wasn't clear on the distinction, we'd briefly clarify the situation. It's exactly the same circumstance clarifying the OGL, GSL, or d20 License.