I see a lot of "complexity is inherent to existence" type comments. They aren't wrong, but they show that OP's phenomenology could use a little frame work, so to speak. "We've made the world too complicated" could be fairly seen as "complexity is something humans expressed under specific conditions". Not saying we should always strip agency from the discussion (lest we slip into nihilism), but I think it's fair to frame the complexity as a material condition in which we live, rather than something that recedes if you "look at the birbs".

If you can make peace with that, you might then perceive that while all material conditions are complex, it's our existence within them that's fraught. I'd suggest that the discomfort you feel is from inhabiting conditions that change faster than competence can be transmitted across generations. Pre-modern humans (and other animals) didn't experience this (as often, or as intensely at least) because their conditions changed at evolutionary speed. We used to grow up in the same world as our grand parents. Now our parent's lessons are obsolete before we're born, and we're left to cast around for certainty that only comes with generational adaptation. That's almost the definition of anxiety. Thankfully, looking at birds can actually help deal with anxious thoughts!