I would recommend asking for a discussion of the issue. If you are granted the opportunity, hear him out. Leave anger and defensiveness at the door. Even if his perspective on his upbringing is different from yours, remember each person’s perspective is unique; just because you didn’t perceive something one way, doesn’t mean he had the same perspective.
Yes, it hurts to hear we’re not perfect parents. I cried many tears in the discussions with my own children. At times, the emotional pain was so great that I’d rather someone physically hit me because I think it would have been easier to deal with. Once I worked through it, however, it was a life changer that has only strengthened my relationship with my own children.