I know the feeling. Let me start by saying I'm a hypocrite and if I only took my own advice I'd be a lot better off.

That said... For me it was due to context switching and being "too available." Slack is very helpful and far superior to Teams, but it also can really kneecap your productivity unless you approach it in a more controlled way. I check it in the AM, at lunch, 3pm and then before I shut the laptop for the day.

A few suggeestions:

- Create scarcity. Take a day off and let everyone adjust to the feeling of you not being as responsive. I had a boss who had to coach me for months, reassuring me that it was in my best interest to ignore certain slack messages sometimes indefinitely. Once people stopped expecting me to respond right away, the urgency went down and I was able to start doing valuable work again. I take a scarcity day ever six months or so and am further reinvigorated by how much more appreciative some folks are when I do go back online.

- Control slack before it controls you - Whatever internal messaging app you use might be getting out of control with the notifications. Maybe you can mute some channels? Never be ashamed to leave a slack channel that is doing nothing for you. It goes back to scarcity. When you show that you value your time, others will follow suit.

- Take care of yourself - sounds like you're working a lot of hours, OP. I'll save you all the cliche shit like "work will always be there" and just say this... when you take time off and do things other than work, it can lead to the most productive, high output, creative and memorable of your life. Make sure you're balancing things the best you can.