Nothing. Just cry. DX
...Seriously, though, I guess it depends on your perspective. I'm almost in the same boat as you: 2 months, 4 episodes, 66 subs. And I thought that was amazing! I've had the same comic on Tapas for the same amount of time, and it only has 10 subs.
Also, if you're in the mood for a little ego boost: I'm subscribed to a comic that's been on Webtoon twice as long as mine with over 5 times as many episodes as mine, and it only has 68 subs. In comparison, I think we're both doing pretty freakin' well~.
My point is that everyone's experience is gonna be different, and it depends on a lot of factors: luck, of course, the popular art-style/genre of the day, and your writing skill (yeah, writing is third on the list, and unfortunately it's for a reason).
You noticed that romance manga are successful, eh? Then maybe you should try doing one. I'd only recommend it if you're genuinely interested in it, though. Forcing yourself to plug away at a comic that you don't like just to become popular sounds like a recipe for disaster...
And, of course, if you don't want to follow the trends and do a romance manga, then you're just going to have to develop a thicker skin. Keep doing what you want to do and ignore the overnight success stories; they'll only bring you down. Have patience and celebrate the smaller victories. This may be pessimism talking, but "improving" your art/story/update frequency will only do so much. Plenty of geniuses go ignored.
The moral of the story is: Sometimes, all you can do is wait.