One of the main criticisms I see is that low-Elo people also get show mainly high-Elo people. So there's much less chance for two low-Elo people matching with each other, the algorithm works against it.
Since you have a limited number of "likes" per day, you have to actively "say no" to people that's attractive to you.
Since you have a limited number of "likes" per day, you have to actively "say no" to people that's attractive to you.