From what I grasped S2Manga is a group that translates mangas/manhwas (apparently with google translate) and drops a lot of badly translated chapters in blocks instead of waiting for the actual uploader to translate
The reason people hate S2 is because they snipe scans from other translators without their permission and then pump out lots of chapters but all low quality. Some even unreadable. They have done this to LOTS of popular comics. It's rude to the original translator and they never apologize, instead they tell you to go to those website so they can profit off it
I wasn't really sure of I got that right because I too am still new to thos while S2Manga thing
I'm not completely into into it either. This is just what I've heard from others. I haven't looked into it personally ╮(￣▽￣)╭
I see, they must be a huge pain. I was truly confused when I went through that chapter. I was like, w h a t.
I was reading and at first it was normal by far. And then the panels and what they said didn't add up in my head. And what's this with S2? Some mind explaining it to me?