I hear you, but I don't think the article is that specific.. It's an internal article.. I happen to agree. Along the lines of Era, a greek, you could put stoicism in there. But writing about it wouldnt be stoic.
When the title is "Internal competition can often be the most dangerous kind", I would expect some sort of support for the idea that internal competition is dangerous. I didn't find it. They had internal competition, their product failed, but there's only the vaguest handwave towards relating these two facts together.
Are you looking for a 'proof' of his claim ?