hand-wringer
/ˈhandˌrɪŋə/noun
A person who wrings their hands, especially in grief, despair, or anxiety; (more generally) a person who gives vent to these feelings in any way, especially as an exaggerated display of distress or anguish over some event or (now usually social or moral) issue or concern.
Origin
Early 20th century; earliest use found in The Lowell Sun. From hand + wringer, after to wring one's hands.