@Siikalahna LOL
First, he already do that, and it just a few of them, since not all of them is not in frontline, and to get pass those armies to kill the one who controling is basically suicide, which he already experience it before...
And why Fairy side didn't control dragons like the enemies? Because fairy country now in peace with dragons...
Its not the author writting skill that bad, it just your reading and comprehension skill that quite lacking...