There are many Pali suttas (such as AN 3.37 & DN 27) referring to how the dhamma fluctuates in the world in cycles of increase & decline. Note: the word 'dhamma' can also refer to a genuine moral code in any religion.
DN 31, particularly in its section on the 'Six Directions', is a sutta which explains in detail how the various people in a society, including parents & children, husbands & wives and employers & employees, should ideally relate to & act towards one another. When dhamma in the world declines, these various social relationships can become dysfunctional.
Related to the above, there are suttas, such as Iti 74, which is about how a morally superior son can have unethical parents, and AN 4.53, which is about how either a husband or wife or both or neither can be unethical.
Today, as I generally do on a Sunday, I attended an anti-genocide protest. It always inspires yet also makes me sad to see many people at these protests from a traditional simple culture; how gentle & ethical they appear. For example, today, I spent an hour walking behind this lady (with whom and many others we were carrying a very large flag) and my mind kept perceiving/noting how this lady looked like a saint (her facial skin & faculties were so clear). From time to time, all these young children would come smiling & laughing around this lady (who they obviously knew), as they would sometimes help carry the flag or otherwise run under the flag & having fun.
If we come from the West, we may observe how many believe the West is a moral or ethical civilisation but, in reality, despite its historical pretenses to religion, the West probably has the most brutal recent history of all societies, such as engaging in chattel slavery, a Monarchial-Capitalist-Neo-Feudal socially exploitative Industrial Revolution, countless 19th century wars, which all culminated in two World Wars resulting in around 100 million deaths, including the related rise of totalitarian ('asura') systems of government such as Communism and its counter Fascism plus a Capitalist Great Depression. Today, we can witness the West continue its unfettered lawless brutality in various parts of the world.
The above is all related to the decline or absence of 'dhamma'. From brutal societies with worker exploitation or from brutal wars or from the cruel Great Depression came some of our parents, depending on our age. If it was not our parents, it was their parents, and this absence of 'dhamma' ('ethics'; 'kindness'; 'humaneness') was passed down, from generation to generation. Social cruelty afflicted upon parents resulted in cruelty afflicted upon their children; or otherwise, other types of dysfunction. If our parents or family were unloving to us; it was generally because cruel things happened to them. While my father was never cruel to me, I remember once him unable to talk about the Great Depression, how hungry they were for food. Tears came in his eyes, but he could not talk anymore and he nearly lost consciousness. I was shocked how his mind subconsciously remained so deeply traumatized by the Great Depression.
It follows the Buddha taught (in Iti 74) a son (or daughter) can be ethically superior to their parents; and, unlike their parents, the son (or daughter) can take refuge in the Buddha, Dhamma & Sangha. The son or daughter can follow a different path than their parents; a path which leads upwards.
As for this current world, today, the cycle of improving 'dhamma' since WW2 started to decline in the mid-1980s, with the return of Neo-Liberalism. We do not need to get carried away with evangelical Buddhist teachings about 'metta'. In the suttas, the Buddha gave priority to developing dispassion/distaste/non-delight towards the world (AN 10.60).
Today, I was walking in the big city, surrounded by sky-scrapers, with a saintly looking woman in front of me from a past culture, understanding the pointlessness of my endeavour (however I return each Sunday) and my mind was reflecting: "The ending of the sankharas is bliss".
Buddhism instructs us to strive for peace; to reflect on impermanence; including the impermanence of our life. Try to reflect on whatever hardships may have afflicted your parents & family. All our lives will pass away soon enough. The Dhammapada says: There are those who do not realize that one day we all must die. But those who do realize this settle their quarrels. (Dhp 6).