material for criticism; grounds for criticism
Refers to facts, actions, or statements that can be used to criticize someone or something. Often used in political, journalistic, or personal contexts.
His gaffe became perfect material for criticism.
This report contains a lot of material for criticism.
批判 is the act of criticizing, while 批判材料 is the material or grounds used for that criticism.
材料 means 'material' or 'ingredients' in a general sense; 批判材料 specifies material for criticism.
Compound of 批判 (criticism) and 材料 (material).