We do, we do like her.
She’s definitely flawed and has made mistakes but she gets a lot of narrative sympathy. Not only does she get those flashbacks to Leon that show she’s missing him, something that endears her to the audience, we also get glimpses of her background, where she was forced into prostitution by her mom. So a lot of her need for security and acceptance come from that.
Also, she didn’t kill Leon, she thought they were going to steal from him, but Johnny jumped the gun and had Leon killed. She’s continued protecting him so of course she’s not an innocent victim in it but I would say that we’re meant to root for her to finally find some happiness with Jacobo/Leon.