Fed-up with META PSC and toxicity.

Joined meta last year , got meets all rating in December PSC , this half was rather slow in terms of team project plus all the speculations of layoffs , My manager asked me 3 months back to keep an eye on diff count and lines of code as that can be flagged by higher management during mid PSC We also got a new project so finally I had some substantial work , I worked my ass off during the last 2-3 months with diffs and lines of code in the top 3 of my team , I also did some good work in achieving milestones in the new project . The mid review was closed on 30th June I felt confident that at least I will get MEETS ALL, my manager dropped review , that is really really bad . Also some of my colleagues backstabbed highlighting only the things that went wrong in peer feedback. My manager literally mentioned I am performing way below my level .Not to mention my last few oncalls were hell with someone raising SEV almost Friday nights and I had to give up my weekends . I am worried that I might getl MEETS MOST. I feel really burnt out in a year , now I am planning to prepare n may be interview for Google . Any advice if google or faang review process is similarly competitive and toxic? Any advice how to deal better? Blind tax L4 Tc - 170k USD Inc stocks ( EU located)