Should you ask permission to write better code?

Many years ago, I started working on a project, the code base was huge, developed by about 25 different developers over a span of 3 years.
The most recent parts were using a Dependency Injection framework, the older parts ( basically 70% of the entire code) were not.

One day, after I had finished my ticket in advance, I was so pissed I had to waste so…