the road to hell is paved with good intentions（谚）徒有良好愿望而无行动，毫无用处，好心办坏事

【例句】
She tried to help by defending Dad's position and they haven't spoken since-the road to hell is paved with good intentions.
她试图通过维护爸爸的立场来帮助他，从那以后他们就再也没有说过话-- 好心办了坏事。

Yeah, well, the road to hell is paved with good intentions.
是的，好心办坏事。