Are ethics and morals universal and unchanging or are they culturally relative, changing and man-made‎?

Ethics are not black-and-white I find it hard to believe that ethics are universal and unchanging, if there is an objective morality, we would need a source, and arguably that has never been confirmed. The divine command theory and Kant’s Categorical Imperative have been used by advocates of universal ethics, both of which have their flaws. Time has also played a role in ethics; what ancient cultures practiced in the past are now considered by the majority to be immoral. They are definitely man made and culturally relative, also, I think that they don’t change, they evolve with time. I think the core things are pretty universal, and other specifics are man-made. There are people who think that ethics and morals don’t really exist. All you have to do is push in front of them in a line and they immediately prove they don’t really believe their own rhetoric.

And you, how do you feel about that? What do you think about it? Explain your views.