Complex sentence: Lori's life still goes downhill, with her father turning alcoholic again due to his wife's condition, popular boys and girls bullying her and mocking her lifestyle, until she summons the traveling helmet of Doctor Fate, in an attempt to tame its powers.
Split into simpler sentences: Lori's life continues downhill, with her father turning alcoholic again due to his wife's condition, and popular boys and girls continuing to bully her at school. She summons the traveling helmet of Doctor Fate in an attempt to tame its powers.