Hi I've taken a look at your comics and here's some things I think you're doing wrong... Please don't take it the wrong way... Not trying to be mean or anything so advanced apologies...
1) I checked out sky travellers... And no offense but it looks like a typical fantasy comic to me with not enough plot depth. Seems like you just read a few fantasy comics or something like that and then you decide to create a story following a template. Dude, not trying to be mean or anything... I used to do exactly that. Did a comic long ago called "katropa: story of mara-nina"... Back in 2003... And it flopped the big one that I abandoned it by the 3rd chapter. Got bad comments constantly about my story and art and lame dialog cuz English isn't my 1st language.
And most of all I got bored cuz it didn't resonate with me at all... So I abandoned it and did Brood Knight (shattered hate)... That comic got more successful... Been number 1 on drunkduck a few times. Of course I got criticized for the intense amount of angst and my crappy art skills but I didn't care. As long as it's serving as my steam valve for my otherwise messed up life in real world dealing with my abusive parents, bad memories of bullies, and socially readjusting to a new culture from being uprooted from Philippines and forcibly moved to Canada as a young boy... I didn't care... I kept doing it cuz I believed in it.
And now my present work is MAG-ISA... And I still get criticized for bad art (I dunno I seem to just suck so bad at drawing I can't improve after over 10 years lol)... And that I'm lecturing people like a Jack Chick tract all throughout the comic. Lost many previous fans from previous comics cuz they don't like that I'm a proud Christian conservative. And my ideology and beliefs are generally unpopular in this world. That's just the way it is and will be.
But I don't care you can criticize me all you want. I believe in it and as long as I'm helping a few souls through my work, it's all good.
Long story short, find something you can believe in. Search within... Or outside. And you will find it if you seek diligently enough.
2) these days with the overload of webcomics out there, your chances of making it big are small and it gets smaller by the day as more and more webcomics get added to an already oversaturated market. Don't feel bad, friend. It's just the way it is. Stressing 1st point again... Believe! Not necessarily in my God or in my ideas... Just anything you can draw strength and inspiration from! And when you've achieved that, you will never care about what others say.
Hope this helps. Again, I apologize if what I just told you has offended you in any way. I only have pure intentions.