Creating a neutral dating app with proper moderation (against harassment and fake/spam accounts) and without the profit incentive would be a great entry point for that organization to study relationships in general.
Possibly, the commercial incentives of these apps have them deliberately optimizing for short-term matches. Or it may be the case that the apps are doing as best as they can manage and the problem is simply very difficult to solve. If the former is the case, then removing or regulating the commercial incentive might help.
If anything, Tinder is the precise opposite of a dating app.
Of course, this has little to do with dating apps.
As incellish as that sounds, I am 50 and I have been happily married for 13 years and before that unhappily married for four from the time I was 28-32. But my dating life mostly sucked in my 20s as a five foot 4 decently successful guy, in great shape as a part time fitness instructor, outgoing, and with a modicum of social skills.
A guy who is not financially successful and who is tall has a much better chance in the dating or at least the hookup pool than a short person who is financially successful.