Here's more of an invitation to rant about something lol but why do you think people don't like the vertical scroll format for comics? I admit it's not perfect for everything, but webtoon in particular makes reading it pretty seamless, so I've never had much of an issue with it. I think it's a neat way to have different formats shape different comic stories, since the format is such an integral part of comics.
For a lot of people the seamlessness is actually what they don't like about it! A lot of people who have been reading webcomics since before the Webtoon boom over here in the West are used to reading comics on their computer screens and not their phones, and don't like scrolling for a long time to read a comic. A friend of mine often says their fingers get tired scrolling through a 50-panel Webtoon episode on their phone. Some people also believe the seamless transitions make it easier to skim through comics than reading a page-by-page webcomic.
For creators, the vertical scroll is intimidating because it's difficult to convert a comic to print-ready pages if you don't plan for print right from the start. If you decide you want to try making a Webtoon and only later realize you want to print it as pages, you'll run into a lot of issues with rearranging the panels, image resolution, text size, colors, and other things. Fortunately, it's a lot easier to cut up pages for vertical scroll than the other way around, so if you think you might want to print your comic someday maybe, just pretend you're going to do that right off the bat and work in print resolution with page layouts in mind, like Stephen McCranie's approach to Space Boy.
For people who don't like the seamlessness of vertical scroll, the app Macroverse was created to be a mobile comics publishing platform where instead of "mindless scrolling" readers could maneuver through a comic with "intentionality" by tapping from side to side. Jason Brubaker really likes this format and has made/reworked several of his comics for this platform, which, good for him I guess, but I don't know if I agree with how effective it is for mobile storytelling-especially considering the lack of swiping to allow for wider panels or spreads (like the various Shueisha manga-reading apps all have) or any kind of haptic feedback. Not for me, but maybe for you!
