Microsoft sucks and so does Outlook. My dad uses Outlook personally and I just can't imagine that. It's like taking your torture rack home with you for personal usage.
Idk I like outlook. Its more feature rich and reliable than any other client Ive used. Especially since basically every company uses Echange for email.
Edit: I should clarify, I dont like outlook overall. But thats more because email in general sucks. Outlook is the best out of all of the email clients though, especially for power users.