You can leave a group chat, a job or a friendship without a farewell tour.

Exits do not require ceremony. The long explanation, the final message, the speech about why, all of it mostly serves the part of you that wants to be understood, and it usually reopens the thing you were closing. Leaving quietly is complete on its own. People work out that you are gone, and the ones who care will ask.

If you are winding something down, let it be simple. Leave the chat, hand in the notice, stop scheduling the hangouts. Say one honest sentence if someone asks, and resist the urge to build a case for a decision that was already yours to make.