First of all there are too many plot holes and second why does he use only flame magic?!?
Like in this story it's not as if he is limited to flame. He can use all those other attributes yet he only uses flame and that's why I'm dropping it.
So many stories makes their mcs only use fire magic but I understand those ones as their MC is only good in flame but this one can use so many other attributes yet he focuses only on flames!