1.) It wasn't all that funny. I recall laughing aloud twice.
2.) The way the movie was "shot" was extremely boring to me. Nearly the entire movie was "filmed" in the center of the frame. I raised this issue in a different post in a different thread (?) and another poster explained that there is a filmmaking term called "framing" and that when you capture actors or present the movie that you keep the actors out of the middle of the frame and you keep them to the 1/3 of either side of the frame.
3.) The story was a bit of mess. It didn't resonate with me. It felt like more than one person wanted to tell a story and it couldn't mesh. You can have competing stories told together, but they have to compliment each other.
A significant problem I have with more modern Pixar movies is that the story telling and narratives are far poorer than Pixar's earlier work. I attribute much of the decline to John Lasseter no longer having creative involvement. The last Pixar movie that amazed me was Coco. I am unsure, off hand, if that was made with Lasseter's involvement. Given the story telling, I would think so.
Also, it sounds like there was production issues with the director.
4.) And this is trite, the music choices were bizarre. Once In A Lifetime is a song that had no reason or purpose to be in this movie. It is almost as if the people making the movie had no idea what the song is even about, and David Byrne has explained the song's meaning in past interviews. It wouldn't take much research to understand that it is not consistent with Elio's behavior. Elio was not operating on auto-pilot and was making very deliberate choices and behaviors.