Many years ago, a friend of mine complained to me that his parents were the last people to praise him. He scored 96/100 In Math which was an astounding score for those days ( although it may have become all too common now). The only comment his father made, he told me, was to ask what had happened to the missing 4.
There is a school of thought that people in some cultures find it difficult to praise others. We from India, for example are reputed to be niggardly with praise. It doesn’t come easily to us. One reason could be our belief that the task accomplished was only to be expected and hence did not deserve special mention. He was supposed to get 100 and he got 96 kind of thing.