Hi
Thanks to @lovethewayoumove and all the people that posted here.
I have a similar problem with stuttering DCS and I followed the indications but unfortunatelly did not help.
In my case the problem was an interference with another software (I am still investigating which one it was) running under windows. I closed all not necessary software (on the bottom right of windows11) and finally I could fly without stuttering. I hope it helps you too!