Rightly said.

I spent good amount of time cleaning up 15 year old codebase and removed almost 10MB of source code files which was being part of production build and it was never used. This helped reduce the build time.

I thought I'd get appreciated from everyone in the team, but it was never acknowledged. In fact my PM was warried and raised an alarm for regression. Even though I was 100% confident that there would not be any regression, the QA and PM got annoyed that I touched a working software and they had to do extra work.

I then posted on LinkedIn about this achievement to get my share of appreciation. :)

LoL managers.