Why does Microsoft hate Edge?

I have the default browser set to Chrome in the Windows OS. So, when I click a link in Outlook, it opens in Chrome. So, any time an application opens Internet Explorer, it is obviously something weird.

Okay, confession time, it makes me wonder if I am computer illiterate every time IE opens.

Since Edge will be three years old this coming July, I kind of expected the switch by now. Why are Microsoft applications opening links in anything other than the default browser? And why are they picking IE instead of Edge?

I thought I would fix the issue by uninstalling IE. In Control Panel > Programs > Turn features on and off, one can choose whether IE is installed. Unfortunately, that seems to have broken the ability of programs to use the default browser. Reinstalling IE fixed that.