It varies a lot from person to person. Some people find it a joyful liberation. Some people find it depressing and painful. Some people find it emotionally neutral and get on with their lives.
(I deconverted from Christianity at age ~36. It was a long and careful process—I don’t make big probably-irreversible changes in a hurry—but not, in my case, at all painful or upsetting.)
It varies a lot from person to person. Some people find it a joyful liberation. Some people find it depressing and painful. Some people find it emotionally neutral and get on with their lives.
(I deconverted from Christianity at age ~36. It was a long and careful process—I don’t make big probably-irreversible changes in a hurry—but not, in my case, at all painful or upsetting.)