I don't know if I'd say unbearable (though I haven't gotten far into these comments, let alone the fandom), but many people seem to have unrealistically high expectations of how this story will end. Wishing and hoping is all well and good, but Sangwoo is a serial killer. He's killed at least four people that we're aware of, and there's no telling what his murder rate is (how long between victims, how long he keeps a particular victim, etc., etc.). Even if he's caught and miraculously avoids death, he's going to be imprisoned or institutionalized for life. He's unstable as hell and enjoys killing. He's a predator. I don't know if he'll wind up dead or not (I hope I'll enjoy the ride, though), but even if he and Bum somehow end up together by the end of this, that's not a happy ending because their toxic cat-and-mouse relationship isn't good for either of them.
All that being said, I find the whole webcomic really addictive and intriguing. I think it's really cool how the author balances the insanity and the horror with moments of (arguable) sweetness and intimacy. It's a wild time of a multiple character study, and the tension keeps you invested to see where these characters will end up (because, let's face it, everyone in this story is crazy and will likely all be ruined by the end of the whole thing). Everything's so twisted, and I love it (but the people who wish for a murderous Bonnie-and-Clyde-esque future for the "lovebirds" does concern me a twitch, I'll admit). Let's see how it all plays out.
The manga is great and all but the readers are just too unbearable. I don't know if it's the water that they're drinking, but there's got to be a reason why they're this shallow.