The thing is, dating apps are a business and they make money by having lots of users. So it's not actually in their interest to successfully match people for long term relationships. They want people to use the app as long as possible.

Tinder especially is bad for this. The swiping system is designed to give the impression that there is an endless supply of profiles for you to swipe. They want you to think that you can always find someone better if you just keep swiping. This causes people to be less invested in each match/conversation/date than they would be if they could see that maybe the person they're talking to is actually their best option in the area.