Sadly, you should feel alienated. When you choose to use proprietary software, you further the injustice that it creates over society. Windows is so shamefully harmful, even outside of just being proprietary that choosing it in 2024 is choosing the side of unjust power, and you should be rightfully alienated for making that decision.
Yes, but the originally free/libre licensed source code is still out there.
You could also make improvements and release them under a GPL license.