hand-wringern.
/ˈhandˌrɪŋə/, U.S. /ˈhæn(d)ˌrɪŋər/ A person who wrings their hands, esp. in grief, despair, or anxiety; (more generally) a person who gives vent to these feelings in any way, esp. as an exaggerated display of distress or anguish over some event or (now usually social or moral) issue or concern.
ΚΠ
1918 Lowell (Mass.) Sun 18 Jan. 10/4 For years there has been an element which has sat back at the motion picture houses, wringing its hands and moaning... These hand wringers always have contended unto themselves that if they had one chance at acting [etc.].
1941 Rhinelander (Wisconsin) Daily News 16 Dec. 4/2 The United States is at war... America's defenders suffered a setback. Some head-shakers and hand-wringers saw the setback as defeat.
1957 Sci. Monthly Sept. 126/1 The problem is not as difficult and insoluble as the ‘hand-wringers’ are making out.
1992 Economist 15 Feb. 45/1 Firms in Germany are being crippled, according to the hand-wringers, by high taxes, expensive labour and big environmental and power costs.
2012 Irish Times (Nexis) 17 Oct. 14 Nothing was done to protect the nation's children from abuse... None of the bishops said a word (as far as I recall), and few of the practised handwringers did anything.
This is a new entry (OED Third Edition, June 2013; most recently modified version published online March 2022).
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n.1918