Why didnt mexico just stay with Jes�s Ram�rez? mexico sub 15 17 coach?

The reason is the owners of the Mexican teams agreed on acquiring a top European coach such as Sven, in order for the national team to improve the national team level of play. But unfortunately the Mexican league competition level of play is down right now. so that affects the National team. But no need to worry Mexico should still qualify for the World Cup even if they are playing at a low level.