A FOSS or nationalized dating app would still result in:
1. The feeling of FOMO (99% of swipers stop swiping before they find their REAL soulmate for real this time)
2. Impersonality. One cannot effectively communicate that they are generous, kind, and funny or any other set of attractive but abstract qualities in 4 photos and a short bio.
4. Similar to impersonality, is the loss of contextual bonding. Especially for women, being in proximity to a potential mate tends to work a lot better than seeing a few 2D photos. It's crazy to think about, but a huge percentage of happy long-lasting couples who met organically would have never swiped on each other, me being one example.
5. Asymmetrical supply and demand (women dying of thirst in the ocean while men die of thirst in the desert)
6. The 'stranger' dynamic makes everything low-stakes and therefore low effort. There is no social consequence for bad behaviour, whereas if you met someone at work, school, church, or were introduced by a mutual friend, there IS a social cost for ghosting, manipulation, superficiality, etc.
7. All of the above results in WAY too many interactions in a romantic or potentially romantic context, and I don't think people were meant to have dozens of situationships for a decade before finally getting success. The constant churn and burn cycle results in burnout. The burnout is exhausting and discouraging and worse, can lead to feelings of antipathy.
None of the above is actually solved by a different ownership or funding model. I'm sure that building an app in such a way that artificially gatekeeping a superior experience behind a subscription creates its own set of winners and losers, but I don't think that is actually in people's top complaints about the dating app experience!