Hopefully it's +2/+1, a couple skill proficiencies, and a free feat, for which the shown human chose Polearm Mastery (which also granted polearm proficiencies).
But if the last feature isn't a feat option but is Polearm Proficiency, then yes Human is the worst race choice by far.
I expect that it's like you suggest, part of the Polearm Mastery Feat which that particular player chose.
