I'm quite surprised you disliked "The Muppets."
One only wonders why.....
It just didn't do anything for me as a movie-goer or a Muppet fan. This was going to be the first theatrical Muppet movie in twelve years and nobody could have had higher expectations for the film than I did. I knew the basic plot and that there would be a brand new Muppet introduced, but other than that I approached seeing it with an open mind. What I saw was nowhere near what I expected.
The way I understood it, Walter was going to be a supporting character. Normally I would have had no problem with him being the focus- except he was completely unlikable! I was an outsider when I was young and yet I never played the victim and my family was much more supportive. Also, I hated how Fozzie and Rowlf (my two favorite Muppets) were used. There was so much hype about Rowlf returning- and as a major character! Yet he was not included in the pick-up montage and the most dialogue he had was reinforcing that joke. If this is the extent that he was going to be used in the film, then I have zero hope of Rowlf ever being included substantially in any future Muppet projects. I'm disgusted with the fact that The Swedish Chef has had lines in every Muppet film since Jim's passing and we've been deprived of Rowlf for over twenty years.
As for Fozzie, the closest I came to crying during the new film was the hammock scene- only to have it taken away by the 'fart shoes'. And this film firmly established Statler and Waldorf as villains. By making them executors of the theater's contract, no wonder the contract contained loopholes; S&W have been plotting against the Muppets since 1976. And this goes for the plot of IAMMCM, as well. Finally, the ending was a downer- the Muppets don't make enough money and Richman wins the day. Then when the Mahna Mahna... whatever that was happened, I got ready to leave but my dad begged me to finish the movie. Well, thank God I did because they don't reveal Richman's 'change of heart' (convenient, wasn't it?) during the end credits. So, I'm glad I saw it but for all the hype around it and all my high hopes for not only the film but the future of the Muppets, it didn't deliver and disapointed me hugely.