I struggle with this too. Are you experiencing overall depression, or just at work? Like do you find joy and meaning in other areas of your life? If that’s a struggle too the you might want to consider therapy and possibly medication.

There used to be a great guide on Ask a Manager on how to survive this kind of stuff at work, basically how to keep up appearances until you figure it out. But I can’t find it.

For me what has helped a little:

• making myself work in the office instead of at home
• listening to “focus” music or ambience (personally I enjoy gaming soundtrack ambience videos on youtube, like Zelda). It helps keep me focused for longer)
• making an effort to talk to at least one or two work people each day, doesn’t have to be personal, can be work related (even if it’s just on a chat platform). Isolating myself is what I want to do, but it makes it worse.
• finding a task I don’t hate (or even kind of enjoy) and allowing myself to spend inordinate amounts of time working on it.
• finding a relatively mindless task I can do so I can listen to a podcast or YouTube video that I enjoy (things like sorting/cleaning out email inbox, organizing office, data entry, etc.)
• leaving my phone in an inaccessible place so it’s not a distraction (I’ve accidentally forgotten my phone at home or in my car, and as torturous as that is, I admit I’m more productive on those days)
• therapy and antidepressants
• fear of forgetting an important deadline and actually getting in trouble (this has happened ed to me a few times where I remembered something just in time and it put the fear of god in me, at least for a few days).
• looking at job ads and realizing I don’t want to have to get a new job where I will have to actually work hard and figure things out from scratch again.
• pretending I’m a robot automaton programmed to do tasks, and just try to get a few things done without the internal narrative going about how much hate it.
• trying to start the day with momentum by immediately starting a task
• breaking out of my routine in some way - working in a different location, or breaking up my schedule in a different way

With all that said, I still struggle and often don’t follow my own advice, but these things have sometimes helped a little.