Criticizing a comedy is like analyzing an ice cream cone
Maybe it's just me, but I think there are only two types of comedies...Ones that make you laugh and ones that don't.
I personally found this movie and the whole trilogy hilarious! Although, I know it may not suit everyone's style of humor.
BUT IMHO
Hyper-Criticizing a comedy flick's plot, acting ability, etc.is like writing a dissertation on hating a flavor of ice cream, it's not really needed...there are other flavors out there. Find one you like and love on it!