I was employed to take over tasks in the area A. Very quickly I was told to take over also area B and part of area C. These are big functional areas. I signalled my boss back then that the workload is huge and to do that well I would need to work 15 h/ day.
Additionally currently we are experiencing some technical problems, which means that many things in the areas A, B and C can't be performed automatically (they are completely automated in most companies). My boss told me to perform them manually. It's 1-3 h of repetitive, silly manual work EVERY SINGLE DAY. These problems are are only planned to be solved in about half a year. We also have additional technical emergencies, which my boss spontaneously assigns to me and which sometimes take several hours to solve. To give you an idea, when I'm OOO for a day, I then have 100 emails in my mail box, 90% of them resulting in work for me. Nobody is expected to take up my tasks if I'm not there.
My current workload is so huge, it's simply impossible for me to do my work correctly. Nobody would be able to perform it. It's completely unreasonable to expect me to be single-handedly responsible for 3-4 huge task areas.
Of course I raised this up with my boss - several times actually. I proposed solutions: assigning some of my work to one of my colleagues, outsourcing it, increasing my number of hours, prioritising tasks, etc. All solutions have been turned down repeatedly.
I'm looking for a new position like crazy of course. However I have two questions (I know on this site it's preferable to ask just one, but these are strongly related):
I will want references after leaving the current position. What should I do in order not to hear after giving in my notice that I've failed in everything or to minimise the influence of this assessment for my future career opportunities?
I don't really care about the quality of my work anymore. This is bound to fail, so I just can't make myself care anymore. My first reaction to the increased workload was to work through my lunch breaks, avoid even going to the toilet in order not to waste time, work unpaid overtime. But after several months, I'm just incredibly tired. How can I make myself care more or pretend I do (<- important in view of the references)?