I stuck with the older established sites since the start of the year, and the honest result was that the search filter setup mattered marginally most. The matching algorithm and the block list pull in opposite directions, but only if you stick with it.
The awkward truth is that the daily match cap matters slightly more than the matching algorithm, and it makes a real difference. Keep the first message short and specific, because it saves a lot of wasted evenings, and nobody warns you about it.
Granted people disagree here, the step that matters most is to give it a full week before judging: most complaints trace back to that one thing. Even if people disagree here, the step that matters most is to avoid opening with a compliment: otherwise you end up judging it on a bad day.
For what it's worth, the Datewander platform is more forgiving about quieter weeknights, at least in my case.