I love superpower, self cultivation, difficult life, good ffiendship, but I don't like romance,harem,ecchi,
Stellar Transformation Legend of the Cultivation God World of Cultivation The Nine Cauldrons The Dao of Magic
Swallowed Star Archean Eon Art they are both by I Eat Tomatoes, they include everything you included but it has tiny bit romance and thats only for the plot. Swallowed Star even barely mentions it only Archean Eon Art includes it a little bit more because it's a catalyst for one of the future plots which is very important for the rest of the novel.
not all cultivation genre but no romance (so far) Yama Rising Tales of a World Devouring Serpent Sign in Buddha Palm Let Me Game in Peace Superstars of Tomorrow I am Not the Demon God's Lackey Leveling Up Through Eating Trash of the Counts Family Lord of the Mysteries My Iyashikei Game Netheril’s Glory Reverend Insanity (maybe, I can't remember for sure)
Not cultivation, these are all super powers(?) with no romance: No Hero Residence of Monsters Chen Yue Zhi Yao Illusions, Lies, Truth Yu Brothers' Case Book Unique Legend Fu Xing Dong Lai