Maybe, but the nude ones haven't really been... actual nudity so far? Aside from mine (Which did have a content warning at the time, and was marked as mature.), the worst I've seen have been pages showing a side boob, or cleavage, maybe a butt. If a kid gets upset by those they're either too young to be on the internet, or are extremely sheltered, and shouldn't be on the internet. I haven't seen gore aside from people being flagged for small amounts of blood, maybe a cut or something. You could put a warning for those, but if it's a horror or action comic it would be silly not to expect something like that. People do get hurt in those kinds of stories. Even though a lot of the supposed scenes that were flagged were kissing, or hand holding scenes, I don't think creators should put up a warning for having LGBT+ situations and characters. If someone takes issue with that it's their own problem they should get therapy for, rather than trying to sanitize Webtoons of it.
Who knows what the truth is. For all I know a bunch of LGBT+ content creators could have just been blowing stuff out of proportion, or jumping on a hate Webtoons bandwagon. It just seemed rather suspicious since it was a lot of people, and there seemed to be a pattern with downvotes and flagged episodes/pages. Either way, Webtoons sucks, the staff need to get their shit together.