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I think there is nothing wrong about domain length, BUT you have to just consider domain name which should not be the exact keyword or phrase you want to target.

First try to contact webmaster to down your links other wise you can do this just watch the Matt videos:

https://www.youtube.com/watch?v=393nmCYFRtA

And then read this http://googlewebmastercentral.blogspot.com/2012/10/a-new-tool-to-disavow-links.html

might be these both links will help you out.

SOme positive impact increase in CTR, because after these updates all the spam sites hit down towards and our website get more exposure...