Have you ever encountered a situation like this before?

You worked in a team, made many adjustments in the codebase, and all the changes you've made are the best practice (after some research or asking the community).

But the team leader decided to go with the "messy" version of the code and the team leader does adjust the principle of "bad code" in favour of your coworker, just because he/she is a friend of the team leader.

So, whatever you adjust or contribute is simply nullified but any adjustments made by your coworker are considered "new updates".