why mobs have so many movement skills ?

why mobs have so many movement skills ? at high juiced maps ur getting murdered by mobs shadow stepping onto u , flying on a fire ball towards u , suddenly appearing from the ground beneath u .
what in the actual hell is going on whit this game ? is this an arpg or are u tring to make "react instantly" or u die game ?
what ? how do u want us to react to those mobs ?
also what is the deal whit the flying fire balls on the strongboxes that fly whit the speed of light ?
what the hell is whit the mob that flys towards u on a comet i cant even tell what mobs is that instana shoot