That was my mistake when I first started. The manager didn't think it would take too long to finish a task. Well, the naive me, without even looking closely at the code, didn't think it would either.

But I realized the more I understood, the more dependencies needed to be changed. While it's still doable, things started to break and I ended up learning way more about the project than what was required to finish the task. In the end, it took me longer to finish it.

The fact that most of my coworkers would write a hacky solution in a short time, it made me feel incompetent. Managers without a technical background don't look at code, they look at results. So how do you even do #1 when the "other devs" still work there and can get stuff done much quicker?