I am struggling with the same paradigm issue albeit slightly different. I’m a product owner doing competitor research on several product features across several competitor products.
I’m also new as of a few weeks so take this with a VERY large grain of salt… but what I intend to do is make product-specific pages on each feature using my normal notes template and reference using tags (#productname/productfeature). Then I’ll distill and aggregate into a single [[product page]] and [[feature page]] by embedding blocks.
In general, I agree about the issue of duplicating information across multiple pages. I think it’s worth avoiding by way of embedding/referencing.
In your example, it seems like there’s a one-to-many relationship between problems and features so that may guide your organization.