A disciple not able to surpass his master is unfortunate.(是徒弟不幸.)
A master denying his disciples to surpass him is even more unfortunate.(是师傅不幸.)
It is unfortunate of a disciple not surpassing his master.(是没有超越师傅的行为不幸.)
It is even more unfortunate of a master denying his disciple to surpass him.(是师傅制止徒弟超越自己的行为不幸.)