Yep, I can see that this is going to be an interesting topic....
Doing a Duck Duck Go search reveals that Apple does not provide a simple path for bug reporting to the general public....there were several third party sites that did a deeper dive into what paths were available.
In essence, if you are a registered Apple Developer, there is a direct path that you can use....but if you are not a registered Apple Developer, you are presented multiple directions that are not clearly a means for bug reporting. THIS
2 year old Apple Discussions thread gives links to the Product Feedback path - and THIS
Apple Developer link guides bug reporting for that community.THIS
LifeHacker article provides another path to Apple links as well as paths to follow for other software and hardware makers.
I think we need a sticky within FTM to help clarify the process.