Using New Outlook on Windows for personal email, calendar, and contact management
Not the worst. It wrecked Skype by trying to make it a chat site rather than a communications service, and opened the door to Zoom. This is comparable - they have a preconceived notion and impose it on customers. Their focus nowadays is on data services and their retail operations are an afterthought. They should sell them.
I'll leave Microsoft altogether if they dont get Outlook sorted. Not that they'll notice.