Cooperation has been "invented" in evolution many times independently and is long term stable in many species.

If your comment was true that fact wouldn't exist.

We may consider the world we live in today competitive, but at the end of the day, humanity is a globe spanning machine that exists due to cooperative behavior at all scales.

Comments such as yours are really missing the forest for the trees.

I suspect that it's really the fact that cooperation is so powerful and pervasive that makes it normal to the point where any deviation from it feels outrageous.

So you focus on the outrageous due to availability bias (seeing the trees rather than the forest).