I can’t disagree although it’s almost the same with any corporate IM I have to use for work and school, like Slack and Teams.
First thing I do is taking half of an hour to disable notifications on Desktop, phones, mails, and even doing that they are trying to steal your focus interrupting you due to lack of settings for that.
I think the default fight for our attention creates an expectation of immediate response to everything and we should counter-fight to create the opposite effect. Digital minimalism helps here IMO. Checking messages only once a day, replying hours later unless it’s a true life and death emergency, and so on.