Watching Metztil's trouble, the very first thing the various chiefs of the other tribes decided to do was learn from his mistakes and guard themselves against it, shutting their own rivals from trying something similar.
And once they secured their place, the clever men decided to take a simple wait and see approach, feeling not the slightest bit guilty for ditching their 'leader'.
This was because, despite many of the abilities that Metztil possessed, he had many detractors, who found the man to have quite a few glaring shortcomings.
One of the biggest ones being he was not considered to be particularly clever or politically savvy. Or at least not as much as it required one to be able to masterfully navigate through the complex maze involving so many different tribes and factions.
Metztil was only able to maintain rough control through his tribe's overwhelming force as well as the occasional brilliant advice from his chief shaman.