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It's worn out with possibly a broken belt. My Dunlop looked about the same after 4700 miles but my tread was a little more even all the way around. Not as severe as yours.
if you have done that to more than 1 tire i would say too soft of shock or out of true wheel
I think that tire was the Michelin scorcher which is an improvement over the dunlop
To me it looks like its wearing normally as it should. Straight down the middle wearing out the longest water channels first and leaving the shorter ones intact. If anything it maybe just a tad over-inflated by a couple of pounds.