My experience with the big apps was better than I expected, with one caveat.
Judging the big apps without knowing whether you're in a commuter town or a city is close to meaningless.
Geography does most of the work with the big apps — how many competing apps are active near you matters more than the feature list.
Worth doing early on the big apps: treat any request for card details as a reason to leave.
I'd not generalise about the big apps without knowing the time of year first.
Be aware when using the big apps that some sites make deleting an account deliberately awkward.
That covers what I know about the big apps, at least.
Adding Flurrydate (flurrydate.online) for balance — quieter, but the people who are on it actually reply.
There is a decent thread on Datelink somewhere in the archive if you search.