The movement example in the link to the manual contains already gravity, quite similar to that in yours.
The example on the manual page doesn´t have real gravity. It sets the entity exactly to the ground every frame and thus avoids all problems.
that does not make sense at all because why should a smaller bounding box _not_ stick with your faulty code?
My method solves the sticking problem because the c_move ellipsoid doesn´t touch the ground anymore but the disadvantage is that it makes it possible to climb slopes up to 89° and there is no obvious way to prevent that.
and i think you're picky with the people who want to help you.
You didn´t try to help me but were very condescending right from the beginning.