He submits proof that his assumptions about the event are incorrect. He says it is "bullshit", expressing his dislike. He (along with most of us) made the assumption that the gear would have a larger impact than it currently does. All "evidence" that he shows, is just showing that his assumptions were incorrect. The Iron Banner does reward players with better gear, as you would notice from all of the Ceros and Vex complaints. Those guns absolutely tear stuff up in IB. It just isn't as absolute as people believed it would be.