I have not been training long (in comparison to say, those shodans present) but I most certainly feel I have done well, in comparison to my hours put into training. I think you have to learn to just accept the level you are at. You never get worse, even if you think this might be the case. One of the shodans at my club said this to me,
"You sometimes think you do worse at one training or another, but most often you will find that your knowlegde of a technique has just grown so you are now more critical on yourself. Your skill level has not lessened."
The only person you really fight against in the Aikido dojo is yourself.
My humble words of wisdom.