Everything has always been "too complicated", it's the default state of the natural world.
Just imagine the baffling profusion of problems that occur from questions like "is that the same plant", or "is that berry safe to eat", or "which kind of sickness is everyone catching and which thing is going to help?" The complexity never went away, we simply made ways to manage it so that it's not seen as often.
So now we don't need divine the complex whims of the ocean god who destroyed the village"... but instead we get to think of the complexity of seismometers and rules about building near tsunami areas.
Complexity itself obviously isn't new, and in many cases we've replaced terrifying, opaque natural uncertainty with systems that are much better at keeping people alive. But I think there's still a difference between complexity that is encountered and complexity that is administered through
We used to have gods of several domains each for taking up the blame for specific and (back then) inexplainable events. It at least gave the people closure or blueprints for action in order to appease them. Doesn't matter if it really had an effect.
But since naturalism whichbset out to explain phenomena with science and logic doesn't give the same kind of closure and it leaves many confused and overwhelmed. Nobody understands everything, nobody is an expert in everything.
Things are definitely getting more complicated over time if your eyes are open. Vibe coding the core systems that run our world will accelerate this.
The difference I'm trying to discuss is when humans started molding the world to our desires in the forms of agriculture, raising animals as resources, and interfering with ecological cycles. You are right, living in the natural world today would be impossible for most people, requiring generations of local knowledge spread across the community. I should have clarified my meaning of complexity as that which is purely human-made.