I don't really know how to put it without sounding like a crybaby but let's say I currently need to work on some really bad code (both in quality and structure) and I don't have to time (deadline) to fix/change/refactor anything. I end up implementing some things by writing really dirty code (because it needs to be adapted to the already existing code) and I absolutely hate it and feel bad about it.

Anyway, not asking for a solution or anything, I know I'll just have to make do, it's part of the job, but for those of you who are/were in a similar situation: how do you cope with this? How do you stop caring too much about quality and just do what must be done?