Review Detail of Ktensei in Earth's Greatest Magus

Well, let's start, exist various types of MC's: the silly MC when becomes stronger get intelligence; The silly MC, who becomes stronger, but not intelligence. But THIS MC, man I never had seen a ****y like that. 1- He is so much afraid of fight, he doesn't try to affront them. 2- He has no thoughts about his actions, like : If I do it, my friend'll die? 3- He doesn't learn about the mistakes that he does.