I remember checking the raws for thsi one, wasn't bad, but had some problems.
MC have a low self esteem ebcause his skill is automatic, he didn't work for it, it it had been a active skill he would feel something as he would decide the power, activation, subject, but as it just "happens" he doesn't feels like he owns it and the effect of it, for his honesty he thinks like he doesn't deserve praise or the right amount of rewards.
Of course that will make many of us think this is another dumbass MC, and sadly...he is.
He never took the reward for his presence/work, his low self esteem and refusing praise made so that his "friend" started to cut on his pay and believe himself to be superior, he announced in public he have a unique skill that literally makes hima target just for existing instead of saying a white lie about him costantly debuffing the other guy, and because he doesn't think he deserves the SSS rank he doesn't use it, that would have made the other guy surrender.
Of cours,e this is the autrhor will, and is bad, but is a fine story with a interesting gimmick, if I wanted perfection I wouldn't read isekai/cheat/reincarnation stories.