I turned off all notifications except calendar reminders (only created deliberately by me anyways), phone calls, SMS/iMessage, and WhatsApp messages (how I communicate with my wife and most of her family). That made the phone much less annoying without needing to delete everything. It's just that everything else is more like email, something I check a few times a day not things that notify me every other second. None of it is urgent, so it's at my leisure.