It seems Cartoon Network can't go a month without showing one of the films at some point.
Even within the series, Rodrick Rules is played much more often than the other movies.
Box Office Bomb: Diary of a Wimpy Kid: The Long Haul: Budget, $22 million. Box office, $20,541,739 (domestic), $33,561,079 (worldwide). The negative backlash over this adaptation replacing all of the cast from the previous three films (spawning the #NotMyRodrick meme), combined with the hiatus between the movies (as even creator Jeff Kinney stated there wouldn't be more films starring said cast due to the child actors growing older), critics panning it far more severely than the original trilogy and competition from Guardians of the Galaxy Vol. 2, dealt quite the damage to this film's overall performance.
And the director of the last two movies appears in a newscast in the third.
Dawson Casting: Lots of high schoolers playing preteens in the movie, which makes the idea of them being in middle school very unrealistic.
This got to the point the third movie was rushed into production so the original actors could be used one last time before they officially got too old to pass as early teens.
Development Hell: In late 2012, it was announced that an animated 30-minute TV special of "Cabin Fever" was in production, and set to be released in late 2014. It's been well over a year since it was supposed to be released, and nothing has been heard from it since.
Follow the Leader: There's no denying that the amount of book series that starting popping up after Wimpy Kid came out and blew up based on middle schoolers' journal entries combining words and drawings were definitely not a coincidence.