just look at the left side of the last pic.. how can an user get bubbles to the straight line? looks like a product error to me...
Maybe he might have gotten a defective unit but still, I don't think any protector would leave that much air and bubbles once installed. I understand some glass just won't adhere no matter what you do but from my experience (installing glass protectors since iP4 ) usually happens only around the edges.
To me, those pictures shows the poster deliberately leaves the air and bubbles there and didn't give any effort to push the bubbles out.