Are you using the right chisels.
Most of the turning there would get a good result from a skew.
But the most difficult chisel to use in such a case. A wide skew of course.
But as has been pointed out, timber choice is not great, last piece looks like
white deal, which is a bitch anyway to get a good finish on.
Try some fresh cut beech, ash, sycamore small logs if you can get some, would make things easy to
sharpen your skills on, excuse the pun.