Tell him "Yes!"
When you listen to criticisms addressed to you, you must first control your emotions and accept that others have the right to express their opinion.
If someone has had the courage to tell you what he does not like at home, that means he intends to talk and he is interested in you. This behavior expresses much more interest than silence and false praise.
"But..."
Criticism does not always coincide with our perception of the situation. It is therefore important to express our position. However, the information must be objective, it is not a question of trying only to justify itself. Our interlocutor will see that we are trying to understand what happened.
In fact, people are willing to accept many things if you respectfully explain their reasons. This allows them to see the situation from another angle, and to take into account the opinion of their interlocutor: you.
"Our" but "helps us not to lower ourselves to the level of insults". Even if you accept the right of your interlocutor to express your criticism, we are not obliged to take it for an absolute truth if we consider that it is not justified. We can still give our point of view
"We will..."
After hearing the criticism and having expressed our well-argued position, it is important to make a joint decision. Concrete and constructive sentences must be used so that the other person knows that we are on the same side.
Responding to a criticism with this sequence: "Yes / But / We will ...", we give feedback that allows us to discover new things, to rectify our actions in a constructive way, and to improve our relationship with this person.