High Martial: SSS-Rank from Bad Reviews

A system-powered power fantasy with face-slapping and multiple female leads. Orphan Xie Yan is judged as F-rank trash at his awakening ceremony, becoming the school's laughingstock. That night, he unexpectedly activates the 'Negative Review Feedback System'—gaining ability points from others' malicious comments! The school beauty's mockery, the top student's contempt, the teacher's disdain... the more he's looked down on, the faster he grows. When his former mockers beg for his protection, Xie Yan casually says, 'That's not what you said before.' — Description from novelcodex.org