I think onboarding is easier at remote-only companies because you can just search for relevant conversations, you don't have to puzzle out that the way to understand the wonky CI process is to go mountain biking because it's the drive home from the trail where they actually hash out the problems.
Oh c'mon. Code is like the cosmic background. It's a picture of how the universe was back when it's author's we're only barely capable of making it work. They know better now, but it works, so they're off doing other things.
Therefore, if it's a year old and it smells bad:
- either it's still like that
- or somebody has since harvested its improvement into at least one standup update, which you can search for
At the very least, you're likely to be able to find who to ask.