Yeah, I totally agree with most of that and really enjoyed what they did in episode 4, but I feel like it's been erased. That episode did a fantastic job illustrating a nuanced and believable backstory that really added some three-dimensionality to the character. The picture they drew of who Laura was didn't make her actions right, but they were at least explainable, or maybe even understandable. And it left an open doorway to.. if not repentance, then at least self-reflection.
Laura wasn't in a good place mentally or emotionally -- I'd say she chickened out on killing herself in the hot tub rather than trying to get 'high' like the article says, because I'm pretty sure heavy duty bug spray doesn't get you high. Long story short, she ended up hurting Shadow a lot more than she hurt herself. And that would be fine, if she recognized it and made some attempt at making things right. But she just glosses over it and expects Shadow to do the same, because they're both there now and she really, really loves him this time.
But that's not how things work. And in a show where Shadow generally doesn't really question what's going on or how things really work (oftentimes to a baffling degree), even he looks at that bullshit and say, "Nah."
I don't think you're supposed to hate the character because of what she did to Shadow in the past, but what we're looking at now is really pretty inexcusable in terms of interpersonal relationships -- which is probably purposeful and will play some part in the drama of her undead life down the line, but that doesn't make her any less unlikeable.
I mean, when they have her kill an innocent morgue worker for literally zero reason at all and express absolutely no remorse for it, I think you can say that the disdain for the character is an intentional part of the story at this point.