Ok, let's break down a few things here.
First, the vast majority of of webcomics are amateur affairs. I see a small number of artists that need to move to the pros, and even fewer writers. Most webcomics are crap, but that's OK. It does not matter what your artistic direction is, when you first start turning stuff out, you are going to turn out crap. Period. Nobody picks up a keyboard, pencil, brush or stylus and becomes a salable artist on their first try.
Second, CGI is an accepted artform in every facet of entertainment except webcomics. Zootopia shows that CGI does not lack for fans. For that matter, there are successful webcomics that are CGI, such as Data Chasers.
Third, most of the CGI hate that I have seen, (and this thread has had some) comes from other artists, not from fans, but there are plenty of fans to dislike CGI (as well as anime, stick figures, hyperrealism, etc, ad nauseum).
And before I get to the crux of my post, let me clear up one other thing. There are over 100 quality 3D models out there for DAZ and Poser, and over 1000 characters to use on them. There are terabytes of clothing, props, and sets. Most of these cost money, so a lot of CGI comics depend on the limited number of free assets out there.
Every one of these assets comes with a license that in almost all cases gives the user (or purchaser in the case of commercial products) permission to use the assets in pictures and art without the need to credit the original creator. In other words the creators created the creations for the very purpose that the comic creators are putting them to. As long as the acquisition of the asset was legitimate, accusing people of stealing is just disingenuous.
And finally most of the people starting out have no interest whatsoever in creating 3D assets, as that would actually take more time and education than learning to draw does, not to mention creating all of the assets for a single street scene would take weeks. For people wanting to tell a story, that's just plain silly. The assets are sold for them to do exactly what they are doing with them. The people using them might not understand that they do not have to take the character as originally distributed, but can instead morph it into something unique and individual.
So my point in all of this is as follows. CGI is a legitimate artform, but it's also one with a very low threshold of entry. Think of the bad CGI comics you have seen as the equivalent of stick figures and MS paint mouse art. Most of the people doing these have no understanding of composition, camera angles, or dramatic effect in art. I know my big weakness in CGI is lighting, and something that I struggle with in every shot, but I am slowly getting better at it.
Remember that most of the people using the 3D route to get their comic on the web are just as dedicated, passionate, and eager as anyone else doing this, and cut them some slack.
As an aside, photorealistic CGI is the biggest offender as it's too easy to do it badly, and takes a lot of skill to do it well. I have spent a great deal of time learning NPR (Non Photo Realistic) but a lot of my final panels are still too close to photos.
But remember, there is a group of people who like CGI comics, and seek them out. I know my stuff has fans, in some cases more fans than my traditional artwork.
Eagle
(Just try to be more tolerant, and not compare CGI artists to Nazis, and other bloodsuckers)