Um, there ain't no such critter as 'perfect', unless you are God, or whatever you believe is the driving force behind the universe, and even then, it's an iffy proposition.
Flexible, adaptive, and perseverent is better than trying to be perfect. Be on time, in the proper uniform with the proper equipment - never be late, light or lost. Keep your mouth shut unless you have a pertinent question (and only ask it once), keep your eyes and ears open, begin with the goal in mind, but allow for deviations.
The only person you can blame is yourself.
And there you have damn near everything you need to succeed in the Special Operations world, or anywhere else.