Unfair PIP following unexpected results [qa]

I know that PIP is meant to effectively remove low performers from a business , leaving the ones who add to the company , which is fine . It´s also well know the high rotation on the bay area , I loved this company so decided to stay , had new management from MX, and a lot of my peers quit , whatever , so I had to support their orphan teams , I was supporting 5 teams at the same time , on top of that , had to onboard new hires. I admit my fault of not know how to say NO, to request, but given I was the only one decided to try to tackle them . So just received poor performance reviews from most of the product managers , my PM decided to file a PIP, unfair given the amount of work I have done, onboard new engineers, and support so many teams. I feel betrayed because I´ve took more responsibility I shouldn´t have , just to not to leave those teams alone and without support, and still had bad reviews, without empathy of the situation I was. This might be my sin. I´m not accepting the PIP because of that , and be aware that QA work here is difficult. HR was just there to send my ultimatum, but not really verifying facts or checking more , was always on the side of the PM , not able to rebuke some claims, #hrissues #lyft #qa