If you have a few spare minutes of time, I'd be really interested to hear more detail about this - what problems you faced, what you felt was unclear, and what you felt was complex. My email's in my profile if you'd be willing to discuss.
CSS frameworks should be speeding up development, not slowing them down so if there's something we can do to make them more accessible, we should find out what that is!
I think I am now easily annoyed when people trying to hide complexity from me, and their creature does not work out of the box. Which makes it really hard to fix bugs. And just think how cumbersome it is to overwrite all the variables to get a new navbar look!
So now I think I prefer some https://github.com/styleguide/css stuff, plus some really easy to use widgets with good design taste stuff.
CSS frameworks should be speeding up development, not slowing them down so if there's something we can do to make them more accessible, we should find out what that is!