I am sorry to learn that you have, apparently, not experienced the many positive aspects of competition. Many (probably most) of my friends, made in the business world, were either people within my company with whom I competed for promotion, or employees of rival companies with whom I competed for business.
You seem to think competition and cooperation are mutally exclusive. This is certainly not my experience. Anyone who has particiapted in team sports would know this is not the case. A balanced personality will recognise when it is appropriate to compete and when to cooperate. And you completely fail to recognise that often the most important competition is with ourselves, striving to outdo what we have done heretofore. From my perspective you have a warped understanding of competition.
I found "standing up to them", while it often lead to physical or metaphorical beatings, eventually defeated them, or - in some cases - 'converted' them. There is an element of the bully in all of us and the most effective solution will depened on the environment, the nature of the bully and the character of the bullied. Absolutes don't work here.
As to