At this point just ignore them, some people are either stupid to not read the a/n or just do it in spite to annoy you. Whenever there is a new nsfw comment and if there is an option to delete the comment just do it (just don’t waste your time on old ones) , but otherwise don’t pay attention to them. Genshin fandom is full of good ppl and total weirdos so you can’t really make everyone happy (even with your amazing work which i love sm), just ignore/or delete the comments and don’t let that affect your day. Of course it would be great to have a type of ban that forbids comments with certain words in them.
