You have a good point that we can start a discussion around but I think you're being overly negative and falling for survivor bias. E.g. Does the success of Photoshop mean proprietary product management is superior? Or does the death of Corel Draw mean it's doomed to failure? And Apple, everyone's favourite product company, has Pages and Numbers which are not better than OO (and Word's incumbency is vaguely illegal).

So let's put that, and FOSS dominance in browsers and IDEs and databases and programming languages and media players to the side.

FOSS could do with better product management: what would it look like? More roadmaps? More figma/inkscape mockups? More user interviews?