word forming element indicating "oneself," also "automatic," from Old English use of self (pron.) in compounds, such as selfbana "suicide," selflice "self-love, pride, vanity, egotism," selfwill "free will." Middle English had self-witte "one's own knowledge and intelligence" (early 15c.).
OED counts 13 such compounds in Old English. Middle English Compendium lists four, counting the self-will group as a whole. It re-emerges as a living word-forming element mid-16c., "probably to a great extent by imitation or reminiscence of Greek compounds in (auto-)," and formed a great many words in the pamphlet disputes of the 17c.
c. 1600, "action of criticizing, discrimination or discussion of merit, character or quality; a critical remark or disquisition," from critic + -ism. Meaning "art of judging of and defining the qualities or merits of a thing," especially "estimating literary or artistic worth" is from 1670s. Meaning "inquiry into the history and authenticity of a text" (the sense in higher criticism) is from 1660s.
In the first place, I must take leave to tell them that they wholly mistake the Nature of Criticism who think its business is principally to find fault. Criticism, as it was first instituted by Aristotle, was meant a Standard of judging well. The chiefest part of which is, to observe those Excellencies which should delight a reasonable Reader. [Dryden, preface to "State of Innocence," 1677]
<a href="https://www.etymonline.com/word/self-criticism">Etymology of self-criticism by etymonline</a>
Harper, D. (n.d.). Etymology of self-criticism. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/self-criticism