that sounds about right to be honest not everyone who reads likes post there's an easy way on webtoon to see how many people actually see your comic.
likes doesn't = views
the comment thing is weird on my episode sometimes I can get 50, and then on some I get 4 but I know a lot of people have read it because of the likes. but if you just click your dashboard and then click on your comic it will tell you how many views it gets. hope that helps.
I wouldn't worry too much unless people are unsubscribing, because on webtoons you can only subscribe to 100 series, so what happenens is that when the fans decide which series to drop. this allows webtoons to know which series are more popular because of the limit of subscriptions