I am in 30s and I can now see countless people repeat their parents patterns about their marriage, partners, parenting when they become parent themselves and in more damaging ways than good. I have seen from my own family where there was lots of DV involved that my sisters went on to find similar abusive men as father, even though they are well educated and independent. They stayed in shitty marriages like my mum and I kept insisting one of my sister's to leave but she said she thought it's normal to have some levels of DV in a marriage.
Similarly I am seeing a friend who ended up his relationship in a similar way as his parents.
My MIL is unpredictable, prone to constant meltdowns and wants total control on everyone's life, when I met my husband, he was very calm person but after having DC he seems to be struggling so much and gets triggered with little mistakes from kids. He seems to having constant meltdowns. I think he is just resorting to the shitty ways he must have been treated.
I feel it's so important to be conscious of our actions as a parent and adult as it truly shapes or damages our children's future and their lives. I wish there were more people who got therapy before they became parents and uncovered their parents bad patterns and learnt on conscious parenting and not repeating it all over again.