Complex sentence: Joanna is rather bitter about life, and is obsessed with her age, taking out her bitterness on her staff, Harriet Schulenburg, Karen Ball, Naughty Rachel and Kim Alabaster.
Split into simpler sentences: Joanna is rather bitter about life, and is obsessed with her age. Taking out her bitterness on her staff, Harriet Schulenburg, Karen Ball, Naughty Rachel and Kim Alabaster.