Despite the fact that the ones with a paywall look similar, the daily match cap differs massively, but it is not the disaster people claim. In my experience, if you want something casual the answer is usually to skip anything asking for a card number to read messages rather than keep your expectations low for the first fortnight.
The profile prompt changed hardly at all over two or three attempts, which changes the whole experience. The discovery feed changed quite a lot throughout most of last year, which explains a lot of the complaints here.
Over the last month the bigger platforms have changed the matching order without saying so, but only if you stick with it. In practice, sites that skip verification have started throttling messages, which is worth knowing before you sign up.
For what it's worth, DatingFly puts less friction in front of the messaging side, judging by what people report here.