Like everyone else has pointed out, there's a ton of things that go into getting followers on a webcomic. How long you've been posting has nothing to do with it. In fact, if you just slap up a comic on a website, even one with discoverability like Tapas, you'll get almost no readers.
But I wanna boost what Mari said.
Comics don't have to be "pretty" to be successful, and sneering at other artists for not meeting your personal marker for what looks good in comics will only hurt you.