Their products behave too similar to those of bad actors. Recently I had a relative over and was helping them with some computer stuff. They had an odd PDF viewer on their laptop and, when I asked them about it, they called it Adobe. It was not Adobe Reader.
I assumed it was the result of clicking through a paid search result and installing something from the internet, but they insisted they got it from Microsoft. I was confused for a while because it wasn't an app from the Microsoft Store.
Then they explained to me how they got it. They clicked on start, searched for "PDF", and "installed Adobe Reader from Microsoft". The icon for the app they had was obviously made to look similar to Adobe Reader and they had no idea the start menu search is a free for all of Bing results.
They're not stupid and I can't really blame them for misunderstanding. When they showed me, I could see how it would be reasonable to mistake the search result (or ad?) for an app recommendation. The result had an icon and everything. The weird thing is that I can't reproduce it on my PC. I don't get the same results that look too much like recommendations, so either I'm on a different release cadence for Windows or I've disabled some of those unwanted features.
The user should be able to trust everything in the OS. A built-in search feature that exposes users to bad actors is extremely frustrating to see.