Mistress Adriana was angry and she needed to get rid of the anger somehow. That is why she chose to do it by crushing her doll and take out her anger on it. It was inanimate and she could always buy another one as opposed to taking her anger out on someone who did not deserve it. The mistress became fine after she was done crushing the toy with her feet.
Mistress Angelina is new to crush fetish and she wanted to give it a try. She went out of her way to do it by crushing toys. She felt that that was the easiest of all the things she needed to do. The mistress enjoyed doing it even as she created a huge mess in the process of crushing the toys. She had no slave so cleaned up after herself.