I can't say whether it's just hard to use in general - but I came to much of the same conclusion as you did. I was especially disappointed by the lack of useful documentation - all the potentially useful video resources at their website are for pay $$$ only - what's up with that??
Also, the few intro videos I saw never quite clicked with me. They presented lots of concepts, but really never explained them much.
I also had tried Graffiti, but that never quite worked, either - and with its future less than sure, I gave up on that. Others seemed overly complicated for my requirements (Kentico, CommunityServer, and others).
In the end, based on a tip by a fellow on superuser.com, I went with BlogEngine.NET for my club's web site, and so far, I haven't looked back at all. It's pure ASP.NET which appeals to me, it's easily extensible, has a fairly large community with extensions and themes and stuff. From my personal experience, I can only recommend you check it out, if you have a mostly (blog) post based site in mind.
