Just a waste of movie and attempted series. I think many were either unfamiliar with the material and just saw a bad movie which it was on all counts or those who were familiar and were seriously let down. They picked the wrong actors with a bad script. The movie was never going to be able to use much material from the books due to the fact that Remo and Chiun killed pretty much everybody they come in contact with during their missions. I read about 20-25 of the books so am not up to date on the way it all ended. I read somewhere there is another movie in the works also maybe a streaming series. The original movie was so bland and that is the best I can say.
Sometimes even a poor movie adaptation can get me interested in the source material. I liked the concept of an everyman secret agent who is not as refined as Bond, who learns of secret agencies and Eastern martial arts, and approaches it with a flippant American attitude. But does even that concept miss the point of the books?
What part of the novel set did you read, from the very beginning or somewhere in the middle? I assume you would recommend if you read 20+ of them. It seems like Murphy and Sapir never ended the series as they handed it off to be continued by other writers. According to Wikipedia, the last novel came out in Sept. 2019. I wonder if Murphy/Sapir ever penned a "final adventure" for Remo.
Marvel Comics did a couple of runs of Remo & Chiun comics. Did you read those? I wonder if they're any good.