What this suffix does
-intentioned forms compound adjectives that describe the moral quality of a person's motivations. Well-intentioned, good-intentioned, ill-intentioned, poorly-intentioned — each compound evaluates not what someone did but why they did it, and whether the quality of their intentions was adequate. "Well-intentioned" is one of the most important compound adjectives in social and moral discourse: it acknowledges good motivations while often implying that good intentions were insufficient to produce good outcomes. The phrase "well-intentioned but..." is one of the most damning constructions in the English language of policy and critique.