possibly a bad brand. I've got General's brand charcoal pencils (a.k.a. Compressed charcoal). There's also Vine, Willow and I think a few other brands similar. Vine and Willow are typically brittle but have enough strength to make drawings with.
Keep charcoal pencils sharpened - no pencil is going to leave you with the control and no grain, if it's dull. As for "next texture" - if you're using shitty paper that could be why. Watercolor paper is nice, heavy weight drawing paper is good, or anything with a tooth to it - Cold Press Illustration Board for example. Hot press MIGHT work, but it's got almost no tooth to it. Cold Press is nice to use for any real dry media.
Doctors heal you, Artists immortalize you.
"Those who can, do. Those who can't, teach" - bullshit.
The usual staples for anatomy: