Complex sentence: Myra also explains that people are always making excuses for her behaviour, such as the beatings from her father when she was little damaging her, but Maureen says he used to beat her too, and she didn't do what Myra did.
Split into simpler sentences: Myra also explains that people are always making excuses for her behaviour, such as the beatings from her father when she was herself a child. But Maureen says he used to beat her too, and she didn't do what Myra did.