Same thing happened to us. Me and a C level guy were personally attacked. It feels really bad to see someone you actually tried really hard to help fit in , but just couldn’t despite really wanting the person to succeed, come around and accuse you of things that clearly aren’t true. HR got the to remove the “review” eventually but now there’s a little worry about what the team really thinks, whether they would do the same in some future layoff (we never had any, the person just wasn’t very good).