Bluntly? You're letting anger and resentment cloud your judgment. Your colleague is clearly not incompetent. He just has different goals from you. He probably wanted to shift from a technical role to a managerial role, and he succeeded. That's not incompetent! And that's probably because he recognized his talents are better with people than with technology. So be happy for his success, rather than resentful of his perceived incompetence.
It seems to me like people skills are a weak spot for you. That's not unusual in our industry. But leading and managing people, sorting out the relationships to make large project work, that work is just as essential as technical skills are. Nothing big ever got built by a bunch of grumpy, resentful introverts.
Rather than hating his "incompetence", try to recognize him (and others like him) as valuable allies. Find ways to work together, to let them deal with the frustrations of relationships, and let you focus on the technology. Create a mutually beneficial partnership. If you can't learn to do that, to trust the "people persons", you're going to find yourself in this situation over and over again.
It seems to me like people skills are a weak spot for you. That's not unusual in our industry. But leading and managing people, sorting out the relationships to make large project work, that work is just as essential as technical skills are. Nothing big ever got built by a bunch of grumpy, resentful introverts.
Rather than hating his "incompetence", try to recognize him (and others like him) as valuable allies. Find ways to work together, to let them deal with the frustrations of relationships, and let you focus on the technology. Create a mutually beneficial partnership. If you can't learn to do that, to trust the "people persons", you're going to find yourself in this situation over and over again.