Thank you all for your feedback.
The article that you have provided helped me a lot in understanding the problem. Knowing that my camera is only 16M with no AA filter, now I need to put more attention to avoiding moire. Strange that I have not noticed it before, at least not to such extent.
It is not my a display problem of my monitor.
I will not share with you the RAW as persons on the picture may not like it. I will try to deal with it by methods you suggested.
Thank you again for taking your time to answer.