The term 'letting go' is neither right nor wrong, but depending on how, when and where the minds use the term 'letting go'.
In the teachings and practice of yoga and buddhism, 'letting go' is coming from the mind itself to itself, to be letting go or eradicating the idea of 'I', or the ego, and letting go or eradicating passionate egoism of attachment, identification, desire of craving and aversion, judgment, comparison and expectation, or letting go the attachment towards the selfless impermanent limited and conditional physical body and the selfless impermanent modification of the mind, being undetermined or undisturbed by the perception of duality, or the impermanent qualities of names and forms, or all the past and present pleasant or unpleasant, agreeable or disagreeable, desirable or undesirable, and enjoyable or non-enjoyable experiences or memories.
Letting go certain unpleasant experiences in the present moment or in the past, and not being determined or disturbed by the unpleasant experiences that is happening, or the remembrance of certain unpleasant experiences that had happened, doesn't mean that one is denying or ignoring the presence of hurtful and damaging experiences inflicted from some others unto oneself. It also doesn't mean that to be accepting, allowing and encouraging others to be continuously and repeatedly behaving badly or hurtfully towards oneself and others, regardless of wittingly or unwittingly.
Meanwhile, certain minds that have been behaving, acting and reacting in a hurtful and damaging way under the influence of ignorance, egoism and impurities, and they use the term of 'letting go' from themselves to others, to justify one's hurtful and damaging behavior, by telling others who are being affected or hurt by one's hurtful and damaging behavior, to accept, accommodate and forbear one's action or reaction of inflicting such hurtful and damaging behavior unto others, by telling others to let go any complaint, dissatisfaction, disagreement, feelings of hurt, retaliation, anger or resentment towards one's hurtful and damaging behavior, to be forgiving and understanding towards one's hurtful and damaging behavior, while continuously and repeatedly behaving in such way.
Such as, "I am hurting you because you have been bad and you deserve to be hurt," or, "I am hurting you because I want you to be good. It's all because I love you very much. You should be thanking me for hurting you, to reduce your sin," or, "You have made me very upset and angry. You made me do this to hurt you. You should be grateful, and you shouldn't be angry or complain for being punished for your bad behavior." Such deep ignorance.
Inquire the truth of everything.