So she tried to get an Oscar nom with Brain on Fire but...
So Brain on Fire is at 17% on RT, and the trades mostly panned her performance. No surprise she wasn't able to deliver in such a role, she's just a terrible actress.
THR:
The film's chief selling point is a pinball-ricochet performance from Moretz that hits all the marks and yet is never wholly convincing — she's more morose than vulnerable, more sullen than terrified. Moretz brought such memorable intensity and preternatural poise to teen roles in movies like Kick-Ass, Let Me In and Hugo; if this project was intended to test her ability to carry a dramatic movie solo as an adult, it's a miss.
Variety
Meanwhile, Moretz plays the character’s mounting paranoia like something out of daytime television, persecuted by water dripping in the sink at home (“What!? Do it again!” she challenges the offending faucet) or climbing on cabinets and shrieking at her colleagues at work
The Guardian
But as the drama ramps up, we’re stuck firmly in dreary TV movie territory and Moretz starts to struggle with the challenges of the role. As a child actor, her precocious nature and startling maturity made her an engaging and unique screen presence but she still relies on a slightly over-emphatic form of acting that makes the breakdown scenes here feel false
There it goes her attempt of getting an oscar nomination, she's more like a razzie contender now.