Anyone else find it hard to stay positive during work?

Putting aside the general monotony of lockdown life (Melbourne / recently admitted here), I'm finding that more often than not any standard deviation from the monotony of work life tends to be into the negative. My team are ok. My work is ok (commercial lit). I don't get much pleasure out of any positive steps or outcomes with my matters, it's more just relief that they're dealt with before moving to the next item on the constantly overflowing to-do pile. In the case of minor mistakes or setbacks, which I understand are normal, I find myself having zero motivation or energy to properly care about them, instead my reflexive reaction is to spend the next 15 minutes mindlessly scrolling on linkedin and/or Seek for something i'm not even sure I'm looking for. I don't see myself switching to any other practice area (or really any other profession for that matter - though it's not something i've given much thought). Been doing this for about 4-5 years.

Is this normal? Does everyone just go through 4-5 decades of this before hitting the retire button?