It can depend a bit on the app too. Some work better than others. This has just been my experience, and I'm definitely not in the upper 20% or getting more than 1-2 matches every 2 weeks. I'll grant myself a smidge above ugly by what I think are average people standards. My short ethnic friends near me are getting nearly no luck at all. So maybe YMMV and you'd be surprised by your individual results.
ETA: I didn't think we were talking about people who already know they can date girls offline. That's not the intended audience of this thread, or so I thought.
Getting that few matches means way over 99%, likely 99.9% of females rejected your profile, nice "sanity check". When I was in a location where my sexual market value was high locally I got over 1000 matches in 2 days, that's what happens when most females like you, the algorithms label you as high value and your success is explosive. In Western countries I still get a bunch daily and over 80% will ignore me no matter how witty my lines, because of the attention excess they already have. Then they tend to still be really flaky about meeting up on top of it, because they have 10 hotter dudes chasing them at the same time. Online dating is a great way of leaving you feeling like you are worthless as a male if you're not in the upper 0.5% of looks, not exactly the advice he needs imo.
Knowing not even 1 in a 1000 women liked your profile. Out of those 1 in 1000 them most likely ignoring you from the start. If not, them most likely ghosting on your soon after. If not, them most likely flaking on meeting you. If not, them most likely not retaining interest after meeting you.
Meanwhile mister super handsome got 500 matches, who are all actively messaging him, trying to meet him. Morbidly obese 40 year olds getting decent matchrates with above average 25 year old males who are interested in meeting them out of desperation.
That's the reality of online dating.
Have you got some dates off it that led to anything ongoing? I wouldn't be surprised if that occasionally worked out for you, but knowing the poverty you are in compared to handsome guys and women of any looks level and age, is not great for your mental health.
Regarding "short ethnic people", I know multiple who can't get a match on these apps but do fine in real life meeting women. If you're of certain races, you need to be even higher in looks to do well on them.