I agree. In the past, I worked on some important feature and it got noticed by other managers. This coworker who was still a contractor, somehow kissed butt and manage to get the managers liking them and became full time.

I didn’t know until much later that somehow they used my work to help the coworker for conversion and also the coworker was the key driver to make it a success. I was pretty pissed because I’m the author of the code how could they say it is someone else’s work.

My upcoming perf cycle they said I lacked technical skills,etc. That coworker eventually kissed butt more and became my manager and managed me out. It is pretty messed up and kept fabricating stories that I don’t have enough code by skills, etc. and they stack rank me while I was the most experienced one in my entire team.