There are no answers other than go update your resume and find a new job. Managers find low performers, directors find low performers, vp's find low performers and they all get axed. Your just a name on a list unless someone protects you.
Google and others IMO are just following a trend that in the long run will hurt them in the long term for for future hires. They'll just have to buy companies to acquire talent like IBM has done. Sucks losing any job, but learn from it and find something better.