On Rotten Tomatoes , Shrek the Third was criticized for the lack of heart , charm , and wit that was present in other films of the franchise .
Upon release , the film received mixed-to-negative reviews from critics , who praised the animation and voice performances of the returning cast , but criticised the plot , humour , lack of heart and the new characters ; it is widely regarded as the worst entry of the franchise by fans and critics alike .
Shrek the Third