My 5 year old spent the whole time laughing. We have the expression "grow up!" that we tell kids. Sometimes I think we need the opposite expression for adults who are peeved when cartoons don't make them laugh.

I simply feel that it could have been 10X better. They had everything for it to be great, and it was just.... adequate.

Here's an example of Looney Tunes elevating the genre: https://en.wikipedia.org/wiki/What%27s_Opera,_Doc%3F

To me, this seems to be an expectations issue. I thought it was going to suck. It's a live action and cartoon mix about looney tunes, itself a broad and very meh cultural artifact IMO. Compared to my expectations, it was funny and good. It seems that you had very high expectations for it to "elevate the genre", which ... I struggle to understand why.

Same here. It was really cheesy for my taste

You missed some really good jokes.

Which ones? I have a copy of the movie and can go back and check.

But in my experience nearly all the jokes had already been done in the original show, or were duplicative of jokes from other "X vs Y" movies.

For me personally, the single funniest thing was "Based on a true story".