I worked with a team of all guys on a project where we sat in a conference room for 6 months and often worked excessive hours.
This was how they "fixed" the flaws in one another. They mercilessly made fun of the parts that needed to change. It worked pretty well. Paul stopped wearing the stone washed jeans. I stopped talking too much. We could laugh at ourselves and admit there was truth in it.
If H&M can laugh at this, take note and change the parts that annoy others, they will be just fine in America. It wouldn't have come to this if they had listened to anyone else around them.
It's just like Trump's hair - that wouldn't have happened either if he had people that were able to tell him the truth.
And this is how you know when people are beyond all recovery like Trump. They don't listen, they don't evolve, they double down.