There was no smut at all or any real romance. I remember that it was quite long and featured a clueless guy who was reborn into a cultivation sect as the eldest brother who had become evil in the original novel. What complicated things was that his second brother, the original hero, had traveled back in time and ended up becoming evil instead. There's a lot of chemistry (and hatred on second brothers part) between the two, but it's one of those webtoons with an expanding cast and love pentagon. A demon girl was a major character?

What made it better than most was that it was mostly a comedy and I'm pretty sure the system awarded points based on BL stuff/fan appreciation. The MC thought he'd transmigrated into a harem novel he'd read, so he interpreted everything in the context of a harem, but he'd actually gone into a gay rewrite/fanfic(?).

It sorta sounds familiar so I’ll try my hand at guessing this although you probably found it by now. Is it Wo Jia Da Shi Xiong Nao Zi You Keng?