I feel you. I'm on the same boat except in a situation that just spending more time doesn't increase my productivity. I'm working to maintain a huge system tha

I feel you. I'm on the same boat except in a situation that just spending more time doesn't increase my productivity. I'm working to maintain a huge system that is kept working and the company I am employed depends on it. It's a mess. You know, it's written in an obscure language not much people knows about so we have no hope of hiring a person who know the language beforehand, almost all original developers were left the company, documents are scarce, and mostly outdated, nobody understand the entire picture of the system as a whole. I am maintaining it by fixing bugs. Most times, we don't know how to reproduce the bugs and there's nobody in the company who understand the portion of the code responsible for the bugs. Because of the obscure programming language, debugging environment is horrible. The best method is essentially equivalent of printf debug. So I ended up spending months on futile attempts to find out the cause of bugs. It's a bullshit job. Spending more time doesn't help finding the cause of bugs. Well, I'm constantly thinking about bugs and the way to reproduce it I haven't tried yet so I'm still working on it, but this type of thinking cannot be measured and evaluate.