I'm going through a smear campaign against me right now, and I don't have PTSD.
My feelings personally range from:

Anger
Helplessness
Despondency
Frustration
Sadness
Depression
Indignation
Hopelessness
Shame
Worthlessness

It's sad that this is what a smear campaign can do to you [emoji17]
I think some of it depends too, on who started the campaign. Who was it that started the smear campaign against you? An ex, a friend?