I don't really have any advice for the negative colouring of incoming messages. But for the onslaught of messages I simply don't have notifications on and will

I don't really have any advice for the negative colouring of incoming messages. But for the onslaught of messages I simply don't have notifications on and will only check it a few times a day when there's a natural break in my work. Also, just leave the channels, there's no reason for you to be on 100+ channels.