There's been a lot of discussion about this. My favorite argument there is that there's a big difference between what makes a dating app profitable, and what makes it good at finding people long term relationships. Not unlike how Amazon is far better off showing you ads in a search than giving you the best matching item that you probably want.
The features that make an app crappier are what makes it sticky and lucrative. Making an app better at matching people is expensive, but doesn't give you revenue. The owners heading in that direction will get offers from the crappier, more profitable app maker that are hard to refuse.
With the existing hegemony of Match, a new company doesn't actually need to worry about becoming profitable; if they can be good enough at matchmaking that they start to catch on, then they can rely on a buyout from Match. Much like how a decade ago, "getting bought by Google" was the business plan of a lot of companies, many of which did get acquired by google.
This probably works once. I'm sure Match's buyout terms will include a non-compete agreement, so you can't keep repeating this trick until they run out of buyout money.
The features that make an app crappier are what makes it sticky and lucrative. Making an app better at matching people is expensive, but doesn't give you revenue. The owners heading in that direction will get offers from the crappier, more profitable app maker that are hard to refuse.