I'm saddened by how much Shifu was mischaracterized in KFP 4

In the three films he had his stable personality, then we arrived in KFP4 and it seems that he is back to being the same as he was in the first film, I feel that Mike and the writers lost control when they tried to bring KFP back to its roots...

In the three films he had his stable personality, then we arrived in KFP4 and it seems that he is back to being the same as he was in the first film, I feel that Mike and the writers lost control when they tried to bring KFP back to its roots...