Humans don’t deal well with complexity. It is one of the practical reasons that may lead to depression. Too much complexity is overwhelming and can deteriorate your mental health, even to the extent of causing aboulomania, that is pathological indesiciveness. I believe this problem, like most things, set its roots during childhood and it is relevant with our fear of making mistakes. Thomas Oppong I have wrote an essay on that. If you care to give it a read, it may put another piece to the puzzle.