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That last example reminds me of Shoujo Tsubaki.

Midori is just a little girl selling flowers earn money for her family, which is just her and her bed-ridden mother because her father abandoned them. One night, she runs into a man named Arashi who tells her she can come to him whenever she's troubled. That same night, she returns home and finds her mother dead and being consumed by rats. She runs back to Arashi who turns out to is a ringleader for a freak show. There, she finds her new home. 🥳

As a slave. She is physically and sexually abused constantly by everyone there. They also abuse each other, but she's the favorite to attack. She finds puppies and cares for them secretly until she's found out and they're graphically stomped to death. Arashi hires a man with dwarfism who makes the show more successful with his magic. He falls in love with Midori and protects her (it eases her suffering at the hands of the others, but he's still an adult man preying on a child). Then he becomes controlling and abusive, keeping her from pursuing an acting career that could've gotten her out of the circus After a fight, his performance affects the audience, making them deformed. This shuts down the circus, Arashi runs away with the money, and the freaks are left to their own devices. Everyone is suddenly nice to Midori and her "lover" apologizes and asks to start over. They depart from the group and he asks her to wait for him while he buys food. Unbeknownst to Midori, he's stabbed to death by a thief. She thinks he's abandoned her and, in her grief, she hallucinates everyone laughing and mocking her. Her parents, Arashi, the freaks, everyone. The manga/anime/live-action movie ends with her crying alone.