Review Detail of MaouMafer in Rise My Elementals!

the story is good, with several interesting points. but what doesn't make any sense in this story, and his brother and his master expect him to become the general leader of an organization, take the silver kingdom, be the most powerful to fight the gods, but they waited 10 years to he starts to become a magician, I don't insinuate anything relevant about magic, his master gave little tips, and still they don't help with resources, put mana stone he would already be a rank 1 star at least, but he's letting him get by when he is important in their plans, it doesn't make sense, at this rate it will take years for him to reach a rank close to master and brother and yet there are ranks higher than them, like someone so important to many people's backgrounds, is left left and evil and an apprentice wizard without stars. Mistress wants him to defeat other disciples of hers, but supports the others in becoming mages of varying rank above him. but waited 10 years for him to become a wizard. besides if he is the most important why put other disciples to hinder him? it doesn't make sense, you can give the excuse that it's part of his training, but he's been trained to be smart, killer and leader for 10 years, so putting rivals as a lesson doesn't make sense. now the important hand training him as a mage has been neglected. and even after he started training as a mage he's still being neglected. it totally goes against his plans to be someone important. I would very much like the author to explain this. sorry for my bad english, that's not my language.