No artist is obligated to create safe art for you.
If you find yourself triggered or offended, shield yourself from the situation.
Seek out places which are emotionally safe for you. Do not deliberately return to places that you have deemed unsafe for yourself.
If you a piece of art or media offensive or triggering, others still have the right to experience it. Do not try to censor it or say it is objectively offensive or dangerous.
You need to take responsibility for your own emotional safety. If you can remove yourself from a situation where you feel emotionally unsafe (and in this case, you can, because your browser has a little ‘x’ at the top), do so. Don’t keep coming back and demanding it changes to suit your needs when it so plainly is not a problem for everyone else. An artist is not obligated to make safe art for you.
Here’s the thing: the world is not safe. There is no way to make the world safe. There is no way to make everything safe for you. You must make the effort to create your own safe space, and a fandom surrounding a webcomic with gore, nudity, sexual themes, kidnapping, underage drinking, murder, violence, self-harm, and suicide is not going to be that safe space for you.