Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Exactly, and how do many of us avoid the apps? Just as Doug says, use Outlook desktop client. Or Thunderbird. Or Windows 10 Mail app. Or any number of email applications.
If you don't like that option then purchase Outlook Premium.
Otherwise Microsoft is going to display ads for an ad supported free service.
You can leave Feedback via the feedback mechanism in the ? menu when logged into Outlook.com.