The details of their shouting are different, but they’re all shouting – at least in part – because stuff isn’t working for them within the context of the post-war expectation that stuff should work roughly the same for roughly everyone.
Key is to understand what is endemic to their audiences. Idea of product-influencer-market fit. For example, Emma Chamerlain built a coffee brand around herself. See the beauty side of YouTube as a leading indicator of what this looks like. Micro/medium influencers.