I'm sort of feeling the same way about my Aventus.
What I'm wondering about though is, does it stale with time, and then freshen up and "live again" if you use it frequently?
At first I'd let it stand by itself (dark and not too hot / humid obviously) for about a month. I wore it, and it seemed to have lost a lot of power and projection. Then I proceeded to wear it several times that week, and I can remember it sort of getting back into its awesome Aventus-stride, leading me to speculate about it "needing" to be used / gain oxygen or something.
Either that, or my mind is playing tricks and mine too is just giving up. I have an 11-batch, cx I think.