Secondly: consider the content and try not to evaluate the child's marriage (many mother-in-law and daughter-in-law disagree, starting from the wedding)
Furthermore: Never talk about the hardship of raising a son, and how excellent his son is. Instead, I changed my position to "the mother who is both a child and a daughter-in-law", said it out loud and praised my daughter-in-law. This is what they want to hear most. It is not surprising that the child is still young and has made mistakes. The question is whether you are helping, teaching or criticizing.
The happiness of children's marriage depends on them. Don't judge them with criticism and unpleasant eyes. Do what you think is right silently and be a teacher in action.