So yeah “things” are shittier, because nowadays we have the ability to live in a nearly post-scarcity society but we just don’t wanna.
Humankind could have been living in blissful peace for centuries. We’ve always had the ability to not kill each other or fight for resources. But many people, then and now, don’t want that.
The way civilizations/empires/countries have operated has largely been competitive. It’s naive to think we’ll all just come together and solve these very complicated problems.
Saying that people are stupid or racist… I don’t think that barely has anything to do with what prevents all major countries of the world to work together to combat things like disease, climate change, inequality, etc.