Yes, I do get bored and frustrated at times, and think about just chucking the whole thing. But it helps that I'm following an on-going (however glacial) plot, with a wide cast of characters and locales. I couldn't do a standard newspaper comic, rehashing the same gags over and over.
If you want to be artistically productive, have no life. Some cartoonist once commented that we are all white-haired gnomes laboring forever in darkness.
My readership has remained fairly steady over the years, at least according to the hit-counter service I use. Part of the problem is that I don't do much advertising, at least none that I paid for. Plus my strip is weird, and is never going to be a popular hit. I accept that. I wanted to tell this story, and I'll probably spend the rest of my life doing it. Tho there is an ending, and I may reach it some decade.
And there are still a lot of webcomics out there. What's really died is Internet forums, replaced with Facebook and whatnot.
"gooey-duck". A clam. Not a snail.