So this finale was a mess and a half and all those plot holes were SUPER disappointing.
But I'm really really really glad that there was a Happy ending. It was great seeing that all Hester all along was to feel like she belonged because of her upbringing. She was THE definition of the outcast.
The reason why she killed the other outcasts was all because they plotted to pin it all on the Chanels.
Also it was kinda assumed Hester killed Gigi in the Thanksgiving scene. The way Gigi was phrasing things, if you rewatch the show, it sounds like SHE killed Boone and tried to pin it on Hester who puts family > anything. And Boone dying made her very upset because that's all she had.
Also I'm confident Hester called Pete to go to the mall and she was on the phone because she wanted him to kill someone else but he said no. We don't know where he went in between and she could've easily hid in his closet.
Also the hint in the first episode was Hester's 90's neon pink & blue jacket when Gigi was living in the 90's.

