A lot of people don't care about the experience of using a computer. If they did, there would be revolts and walk-outs against Outlook and Exchange, about SharePoint, and about every single version of Windows. I am an amateur font designer and even I find the font rendering on Windows (specially if you have mixed density screens) horrendous. It's like it has a dozen incompatible libraries using different font rendering methods that are inconsistent between screens.

It's an old joke that one of the best ways to make someone perpetually unhappy is to teach them proper font kerning.

In Outlook, on the vendor's own O/S, one can click on the "trash" icon of a message, and then watch in horror as a new message arrives, every message drops down a slot, and then the program recognizes the click on the trash icon of what used to be the message above, which is then deleted. I mean, come on.

I have used Linux since 2004, and the fonts were so horrid I read up on configuring FreeType to try make them less jarring.

At this point Windows is largely running on inertia and the fact that, despite all its flaws, its competitors still somehow manage to have worse issues for most people. But at one time, it was actually a pretty damned consistent and user-focused OS.