A decision can harm somebody without having been intended to harm them. The effect matters. It may require acknowledgement, apology, repair or a change in future behaviour. But the effect does not, by itself, prove the motive.
“That decision was bad for me” is different from “you should have considered this possibility”. Both may be fair criticisms. “You wanted it to be bad for me” is a claim about another person's inner life, and it needs more than the outcome as evidence.
Likewise, if ten people think something is wrong and one person disagrees, the ten people may be right. Their view should not be dismissed. But numbers do not establish truth by themselves. Consensus is evidence, not proof.
Being affected by an action does not automatically reveal the intention behind it. Disagreement with an interpretation does not automatically mean that the other person is refusing to listen.