I think Hard Spun realistically would have finished somewhere between a close up third and far off 5th no matter who or how he was ridden.
That premise aside

... I think he deserves some bashing
here are my key points to the ride:
1. pre start) = Gomez decides not to ask HS out of the gate
2. pre start = Gomez should anticipate Prado about to take it wide into turn1
3. out of the gate = Gomez appears to react/anticipate well moving behind/inside of CPWest
4. prior to first turn = Gomez has both the rail and/or lead offered to him on a silver platter as Prado opens wide entering the turn
4A. = here Gomez makes a significant error by swinging back out widest of flight1 and turning down the pace on the rail
5. Turn1= Gomez appears to be doing a nice job of rating Hard Spun
6. Into Backstretch= Gomez misjudges Prado\'s pace OR is purposefully rating a very slow of a pace.
7. 4-6 furlongs= Gomez still does not allow Hard Spun to enter into his cruising-speed stride = this is about the point of no return
8. 6-8 furlongs= Hard Spun no longer has the OPPORTUNITY to gain a positional advantage from his talent of highcrusing stride
9. 8-10furlongs split= moving with the group as they mildly increase pace Gomez actually has Hard Spun at the fastest velocity he will reach in the Belmont Stakes(a mediocre 53.6 ft/s)
10. 10-12furlongs = Hard Spun is asked to out-kick Rags To Riches and Curlin from even terms. Gomez and Hard Spun finish 4th as Hard Spun is unable to out-kick the animals which posses the talent of a strong late closing kick. His final quarter is 5th fastest out of 7 horses.
subjective conclusions:- Hard Spun did not appear to save any energy racing under a hold as opposed to breezing in his optimal natural high-cruising speed (1:11.5?? 1:12?). His pedigree advantage of the ability to cruise for a sustained time period was nullified by racing under a hold. HS gained no positional advantage(lead) during the first mile. HS did not appear to enjoy the last 2 furlongs. It was very hard to tell if HS was in worse form or if the tactics and possibly the distance affected his performance so significantly that his form appeared worse.There was a very good chance that Hard Spun\'s form wasn\'t at a new high. Gomez may have been given poor instructions and/OR has a poor understanding of the relative strengths and weaknesses of HS and would likely be a poor choice for future races.