You're not worthless. Most of us are in the same boat as you. Trying hard to make it, being disappointed when no one has read your work. It's the reality of our medium - on the internet no less.
Nothing happens instantly, everybody goes through disappointing times, but it's what you do despite all of this is will bring you closer towards wherever you want to go. Trust me on this, you're not alone. A lot of us are with you. Not just web comics, but in everything else.
"Why is Logan Paul more popular, he sucks" says the youtuber
"Why is Lil Pump more popular, he sucks" says the fire lyricist
"Why did the guy who let others do the work for him get the promtion?" says the hardworking upstart.
It's more common than you think. No one in the top instantly got there.
They suffered, toiled, for years. Despite this, they never gave up. This webcomic path you chose if you wish to pursue it like most of us have, will lead to a billion heartbreaks and heartaches but keep at it. Never forget why you love making your work.
Lastly, the internet is a battleground. A battleground for the time and attention of everyone. You HAVE to go out there and interact with people, you have to show them who you are and draw them to your work. No one will randomly find you and appreciate you for what it is. You have to communicate.
You know how you just pass by posts in twitter and facebook because you dont care, but suddenly you find this gem of a post that's amazing? That could be your gem. That's if, you show people your gem.
Imma hit you up on twitter and share your stuff.
It wasnt too long ago that I was in your place.
I haven't exactly "made it" nor have I made money off of my passion yet, but I'm very comfortable with myself right now, and I'm just happy to be trying hard and going for my dreams!