Any concrete example can be dismissed as imaginary slights conjured up by people with a persecution complex. You just indicated your willingness to do so. Doing so creates a version of a No True Scotsman fallacy. You demand examples, but any example you are provided with, you will dismiss.
In this discussion you've had the opportunity to hear several concrete examples. For example my description of my son's experience, and JulianChastain's in https://www.hackerneue.com/item?id=45918197. If you're opening to listening, there are plenty of young men out there who are willing to share their stories. Granted, the men doing so are generally hurt. And hurt people overgeneralize. So you need to listen, with empathy, for the hurt. And not dismiss because of the overgeneralization.
What's more likely? The entire world is actually persecuting young men, or: people are having a handful of bad personal experiences, extrapolating them to the whole world, going online to find validation of this world view, and then finally finding the exact SubReddit dedicated to that world view endlessly pumping out examples of it?
There is plenty of evidence that young men have a hard time. In many countries (such as the UK) men are lonelier, and young men have a very high suicide rate. There is nothing like the same pressure to do something about this.
In some professions, especially at entry grades (there are more women than men in medical school in the UK), and in some geographic areas young women earn more than young men. When men earn more than women or are the majority in a profession this is regarded as a problem. When women do it its fine.
There are lots of signs its hard being a man, from incels to trans maxing. They are not typical, but they are not just outliers either, but an indication of problems men in general face.
Its pretty obvious that men are regarded as morally worse than women, and that men are expected to solve problems for themselves as individuals, whereas women are seen as deserving of support from society for there problems.
There are plenty of other examples. Criminal justice is full of it. The US is the only country that is known (I am sure there are a few others, but not the sort of places you can get accurate stats from) where there is a higher rate of rapes of men than women. Which do you here more about? Women in the UK average shorter sentences for the same offence, but there are nonetheless people campaigning for women to get still lighter sentences. Abuse is classified as violence against women and girls by the Crown Prosecution Service, with a little footnote in their handbook noting it can happen to men too (40% of known victims of violent abuse are men, and I would bet a higher proportion for emotional abuse)..
Its not difficult to treat people as individuals in many cases. My older daughter is an electronic engineer. This is still unusual for women. It was because of how I educated her and brought her up, without even making a conscious effort, just treating her as an individual human being.
I'd love to see actual concrete examples of "they have grown up in a world where they've consistently been told that everything is their fault." Not imaginary slights conjured up by people with a persecution complex. Actual social institutions actually telling men that everything is their fault. If they are growing up "in this world" then there must be plenty of examples of this somewhere.