I agree that the narrative could be served well by further exploration of Hazel's trauma, especially in relation to how she responds to her distressing situation both internally and externally, or like how she copes. Hazel's efforts to reframe her trauma aren't often centerpiece as the plot itself takes focus, but I think there's a lot of nuance to be explored there if it were.
In other words: I would've absolutely loved more on the complexity and messiness of Hazel's feelings during ending 2
To WitchyDrop (though if anyone else reads this feel free to respond as well!): No need to respond, but I would be interested about your answer if you have any thoughts on it: Did you like anything about Mary's characterization in specific? What more would you have wanted out of it, if anything?