OK, so the consensus is that Sheila made herself miserable and it wasn't BB causing the sleep deprivation. Have you ever slept with someone with restless leg syndrome? A snorer that even other snorers make fun of because it's so obnoxious? How about the sweet smells Adam lets out at night. These are not all in Sheila's head. She even gave Adam a detailed list of when and how often he did all of the above...because she was kept awake.
Has she been a whiner? Yes, she gets frantic when she's unsure of her fate and TALKS ENDLESSLY. She does like to be in control of her own fate. Sheila RAN when she found out she didn't have to sleep together with Adam when the couples split. RAN. You may not like her personality, but it's still sleep deprivation.
That's the game. It's not unfair, it's the same as slop. Everyone knows if you lose the slop challenge you're put in a disadvantage, BB said that they'd be at a disadvantage if they lost the competition.
BB has these edges and curveballs, there's slop, there's the "how long will you go without cold water" competitions and stuff. They signed up for it, she's getting paid to live in there. If she doesn't want to be around Adam quit the game, BB always has that door open.
Fact is she's open to it and accepting it, it's BB's game and if she wanted to change it she should've won. If she doesn't wish to accept it? She can quit. It's the game, she signed a contract for it. It's not unfair because she put herself in the position in the first place by losing.
Though I understand your point of view.