Complex sentence: Because Lilo is so concerned about winning the competition she fails to notice his glitch and does not understand that the trouble he's causing now is not his fault, she's too busy trying to get him to help her and completely neglects helping him.
Split into simpler sentences: Because Lilo is so concerned about winning the competition, she fails to notice his glitch and does not understand that the trouble he's causing now is not his fault. She's too busy trying to get him to help her and completely neglects helping him.