Global causes of conflict with parents?

Adult children and adolescents often conflict with their parents. Childlike spontaneity and boundless love for the people who gave you life are disappearing. There are no global reasons to quarrel with parents, but people themselves picture problems for themselves. Reasons for conflict with their parents: housing issue, everyday life, inheritance, childhood grievances and even a spoiled mood. A bad mood provokes a conflict, and in this state you can say a lot of unnecessary things. This is how global conflicts are born, in which it is difficult to find a consensus.