Competition or Cooperation: which one is better?

There is no dilemma here. They are the two sides of the same coin. "Life is innately dialetic. Eukariotic cells evolved as a coalition of bacteria and archaea, and that started about two billion years ago." (2) Competition is a requirement for survival and evolution, but without some form of cooperation we all end up on a path to extinction. Finding balance, as usual, is the key.