When there's a really good part on slap and tons of people are questioning why the skater doesn't have a legit sponsor.......Stuff like this is often the reason is why. It might not be as public, but dudes burn bridges all the time.
If you are trying to make it in skating, be as cool and nice to people as possible and avoid any pettiness. Take your chance to shine, but try not to do so at the expense of anyone else.
Also, TNT's run that year was fucking amazing and groundbreaking in ways that cannot be quantified on some objective scale. If the poster is the real Austin Seaholm (which may not be the case at all) he is just proving exactly how much of a kook he is.