>>717717874His back needs to be very arched. Flat back will damage your spine, you're supposed to replicate how your spine is when you're standing up, and it ain't flat.
Arms aren't holding the bar wide enough.
There appears to be 90kg on each side. His arms, shoulders, and core absolutely do not look like the ones of a guy who can bench 180kg for reps. Those guys are a lot fatter (if natty) or have bigger muscles (if on roids)