I totally understand the feeling, but on the other hand, it's incredible that there is so much to explore, so many new things to learn, see and experience. Yes, everything around seems to be pretty complex, at least considering our current abilities [0], but I believe that we can choose how we look at the world/problems - pragmatic optimism may help with feeling overwhelmed :).

[0] Sometimes I think that the perceived complexity of the universe says more about the mind than the universe itself.