He's had a grand total of 8 H&A games where he's had 20+ disposals, and the Dogs have won 6 of them. One of them happened to be a 101-point loss, too.
When you take into account how the voting system works, I don't think he's necessarily been that hard done by.
A better measure of overall performance would be a ranking system that awards every player a vote in every game (eg. best gets 44 votes, 2nd best 43, etc., through to worst on ground getting one vote), as that would also take into account consistency too. Unless they tie it to some sort of statistical/numerical system though (eg. the Champion Data Player Ranking Score), it'd probably be even more arbitrary and cause far more pointless quibbling over inches ("He was 25th-best, not 24th!") than the current system does.