For someone who doesn't know the books the series are based from this is probably as good a review as it could get.
Some of the things you point out as issues blew right past me because I've read all the books and so have the internal knowledge of Reacher's background, and processes.
For me the actor was a bit young, but that was more acceptable than the films having Tom Cruise play the character. I couldn't bring myself to watch them due to the height disparity between the character and the actor.
Yeah, I do not know about the books... But it is okay, I enjoyed watching it 😁