Luckily, every man I met was a legitimately interesting and cool person. I only got _slightly_ uncomfortable vibes from one of them, and he (like all the others) handled it very maturely when I later told him I just wasn't feeling a connection. None except one ended up being a romantic match, but I had a really nice time talking with all of them.
Maybe part of it is just that I'm pretty particular with who I bother talking to and meeting. I don't have much energy or time for meeting new people, so don't schedule many dates. On the other hand, this also means my positive experience is not very trustworthy, as it is likely I just haven't met enough people to give myself a proper chance at a negative experience.
Nevertheless, I do not find dating apps fun or pleasant in any way - they're more like a means to an end that I'd rather step away from as soon as I meet someone I actually like. This tends to be a bad strategy, as from what I understand the other party often doesn't approach focus or exclusivity on the same timeline. So there's a risk of a mismatch in investment (time and emotional), which can become a problem.