Why don't Kenyans value team work?

Why don't we like supporting each other, when we come across something that could be helpful to our struggling peers tunalenga ama we intentionally keep the potential breakthroughs off their sight. I have a friend I taught a concept using A.I to help him get a better rating from his boss. We agreed that once the company adopts the technology, he will call me in as a consultant at some point. Apparently the chance came but he chose not to mention me or create some sort of business out of it. Long story short, he gave the business to someone else. Worst part , he still calls to consult me for free from time to time on the same software. What is wrong with us young Kenyans!! Are we ever going to help each other make it in life?