Human warrior is not competitive in hero pk in general. Reason is - none of your stats are too good so that you have the edge over ppl, and you have no built-in perks.

So you're bad at nothing, but at the same time, you're good at nothing.

Hero warrior should have exceptional stats or perks which they are built around (elf - int/dex, giant - strength/size, svirf - stoneskin, duergar - dethidden/str/dex).