I currently use TinyWall Firewall, it works very well, it’s small/portable, no complaints I even donated to the Dev but I would really prefer open source, also it needs to be user friendly like TinyWall so my non-tech family members can/will use it like they do with TinyWall.
If you phrased your initial question differently or asked more details about OP’s use case I think it would be completely fine. For example, they might be the “sys admin” where they live but their family members would be extremely annoyed if they tried to push Linux.
Just kind tired of the “you cannot ask for FOSS alternatives if you are using something proprietary” and ended up venting because of your comment, that’s all.