I am curious, do you dislike your customers and all of the hardworking and over burdened IT support staff who support your products around the world? You couldn't bring yourself to call this Microsoft Chat, or Microsoft Meet, or Microsoft Friends, or Just Call to align with the singleton names of Mail and Calendar that are built into Windows?
I don't know about your personal relationships but: I don't call my friends and family "My Team". Why do you think it makes sense to call a product that I interact with my friends and family Teams?
Windows comes with the Mail and Calendar, you don't call them Outlook do you, yeah I know there was a time when you called Mail Outlook Express, but at least some part of Microsoft realized that was a bad idea.
Speaking of Mail and Calendar which are built into Windows they can in fact connect to my corporate Office 365 Accounts. Whey can't this version of Teams connect to my Corporate Account as well?
At the same time Outlook can connect to my personal email accounts so if I want a premium experience I can pay for a license for Outlook and use it for all of may email and calendar needs.
Teams should be able to do the same thing, although in my opinion as stated above you should call the app you are pushing with Windows 11 something other than Teams