Evolution is the ongoing process of selection towards becoming more able to live in the conditions there are to live in. Evolution is competition in the sense that the fittest lifeform survive and the unfit lifeforms don't. That doesn't mean they are against each other, and it certainly doesn't mean that any lifeforms are out to extinguish any other lifeforms. They all simply go about their business, and those who are good at it proliferate. Those who aren't, die.
Human competition can work the same way.
Those schemes and activities that work well can naturally proliferate. Those schemes that don't work well can die out. Competition is NOT that you invent something inherently unnecessary, or redundant, or wasteful, or of little value, and you then convince others that it is better than any other choices. Competition with integrity is when there are always multiple choices available, when the choices are presented honestly and clearly, and when those choices that work best proliferate, and those that don't work well fade away. The goal of competition is not to become a monopoly, to win everybody over to your cause, or your product.