Meaning of "A self-defeating move"

Ja-Chung-Su

A self-defeating move자충수#경제/재테크#사회/이슈#마인드셋

A term referring to actions or choices that work against one’s own interests; in hindsight, they lead to self-sabotage

"That single remark ruined the mood and ultimately backfired, inviting an attack from the other side."