“Wonky” is a great word. Askew or amiss might have a close meaning, for those of you not from the UK.
Anyhow, sometimes it’s better for a thing to be slightly imperfect for it to be more interesting. In the case of this little sign, if the clear background portion were perfectly aligned with the front portion, it would be boring.
Takeaway: Can you be intentional about adding some interest to projects you are working on? Adding a tiny bit of chaos could be a good thing.