From my experience, most FOSS software is very user friendly user-centric / user-focused, while proprietary stuff is shit. What is the most notable exception to this rule that comes to your mind?
Edit: With user friendliness, I don’t mean UI design, but things like how the software is handling user privacy, whether it sees its users as users or as money-making cattle, how it handles user feedback, compatibility with other software the user uses (vs. vendor lock-in), configurability, and similar issues.
Edit2: I was made aware that user friendliness is a defined term: https://en.wikipedia.org/w/index.php?title=Userfriendliness
The reason for this is simple enough. The proprietary software has an agenda to squeeze as much from the user as possible, and the Internet has enabled this to horrible degrees.
Windows is about making the least effort to be the de facto OS while slamming you with ads and insistence that you must subscribe to various Microsoft services.
Applications that make zero sense to be browser hosted are browser hosted, because it means to have to be approved by the vendor every time you run the software, it must be subscription.
Transactional software purchases are garbage for the business side of software, there’s a mandate for recurring subscription based revenue.
It used to be these opportunities were impractical and the commercial company budget would sometimes lead them to an easier product than open source, but that ship sailed.
Now for technical users, open source almost always has won and will continue to win, because they are dealing with like minded developers writing for themselves, and so they internalize the use case in a way a commercial approach never can.