Well, it's a crowded field. Hard to almost impossible to get noticed, and once you do get a few people following you, it's even harder to keep them interested.
Truth of the matter is, if making comics just for yourself doesn't at least make you feel better than if you didn't, then maybe just let it rest for a while.
Seriously, if it just makes you feel sad, it's not worth the trouble.
(And it's never wasted time. Your comic's online. People will read and enjoy it, even if they can't be bothered to tell you)