Outlook, Outlook Calendar, Teams, SharePoint... I'm honestly baffled by how bad they are. It's like it was made by aliens who only sort of understand what human beings want. And, of course, Microsoft is super selective about their product managers and pays them a ton of money--even though a golden retriever could have come up with a better UX. Literally all they had to do was fucking copy Google.
So that godawful toolbar layout all ms products have now is called the "ribbon" and it was added right around when XP was going out. Well there's a rumor that even bill gates himself saw the toolbar layout and said "you will have a classic mode, right?"