On the same day I've had the exact same beer score a 44 in one part of the state and a 22 in another part of the state.
I've learned something from probably 80% of the score sheets. It's the 20% of the score sheets that have no feedback, or just plain wrong feedback that I find disappointing.
The biggest flaw in the whole process is - the Judge
You have to go in knowing the process is flawed, by the humans who are tasting the beer.
5 judges could give you a score from 15 to 45 on the same exact beer
5 people taste differently
5 people smell differently
5 people see differently
5 people interpret the word "dark" differently
One of them is in the middle is a messy divorce, and the judges spouse just blew up in their face before the competition.
One judge is battling cancer secretly, and it is wearing on his mind.
Things that should NOT be a part of the critique of your beer, but become apart subconsciously.
What the judge had to eat for breakfast could influence your score.
You can not remove the mind from the man ( or woman )
A computer would be objective.
Learn how to be a judge yourslef, see the event from both sides, and you will learn more about the process.
Olympic reference
It is the same difference between Down Hill Ski racing & Ice Dancing.
One event is timed by a clock, He who reached the bottom first wins the Gold !!
The other is Judged/Scored, by people, and people are flawed.
And in the case of the Olympics judges HAVE been told to score other countries/athletes lower for political reason.
Somewhere in that 20 you got is at least one helpful piece of criticism.
Even if it is the hint that your Porter is really a Stout.
Just my 2 cents