Debbie should’ve kılled Luke instead of Isabella, that would’ve been more entertaining and shocking.
Like omg the crazy girl was crazy? It’s not surprising.
Debbie had stated multiple times that she would do anything for Megan, and she’s found out about her secrets all throughout the season. She could’ve found out about what Luke did to her and how she and Isabella took him to the cabin that night, and gone back to show him not to mess with Megan.
She originally goes to scold him or tell him to stay away from Megan, but when she sees him washed up, barely alive as it is, she decides to just finish him off. That’ll show him not to hurt her daughter.
Also it gives her something more exciting to do than just completely disappearing in the last episode? It gives her more layers. Maybe she wasn’t even sick in the first place? She just knew that nobody would suspect an ill woman as the killer. But at the same time she had to ensure that Megan doesn’t take the fall for it either, leading it back to wanting to frame Isabella, like Steve.
Idk I just feel like it would’ve been a more mind-blowing ending, leave something to really think about. And it adds more to the narrative.
I get that they probably wanted it to be like season 1, where they lay it all out there in plain sight, but make you think you’re wrong until the very last moment where the obvious thing was true all along. It was obvious Jeanette was a creep but the last episode makes you think that she would'nt stoop that low after all, until it’s revealed that she really did know Jeanette was in Martin’s basement. They tell you this all season, but make it just feel too obvious to be true. Just like how it’s obvious something about Isabella is very off. She’s a key suspect in Luke’s murder but again, you feel like it’s too obvious to be true. It would’ve been interesting to explore what would happen if it really wasn’t.