I don't see a problem with what he's doing, and don't see him as bragging. He works for the company. It's like Khaled showing a early pair of a Jordan.
There is nothing wrong with what he’s doing. He is promoting product. It’s like Porsche promoting a 911 GT2 RS that only their top customers have access to. You aren’t flexing if you essentially run the brand’s operations....you’re just promoting the brand.
What else is the man supposed to do on Instagram? Show pictures of his garden??
That said, I prefer Steven Smith‘s IG for quasi-corporate adidas sneaker content. He shares car pics and his previous works from Reebok and New Balance. He’s an OG.