I passed my PIP at Google then they managed me out anyway. If your manager wants you gone and is giving you bad reviews to achieve it then you don't have a lot of options.
(I succeeded in my PIP goals so they were forced to rate me Meets Expectations for that period. But after that if you get another Needs Improvement they can fire you without another PIP, so guess what. When I was sure this was going to happen, I quit because I had another job lined up (thanks to the timescale on which PIPs play out) and I like being able to say I wasn't fired. They had no problem letting me stay long enough to collect my quarterly vesting, but I'm curious how much money I left on the table nevertheless.)
(I succeeded in my PIP goals so they were forced to rate me Meets Expectations for that period. But after that if you get another Needs Improvement they can fire you without another PIP, so guess what. When I was sure this was going to happen, I quit because I had another job lined up (thanks to the timescale on which PIPs play out) and I like being able to say I wasn't fired. They had no problem letting me stay long enough to collect my quarterly vesting, but I'm curious how much money I left on the table nevertheless.)