I watched the race where neither driver was penalised by the Marshals, despite Perez not having the line. I'm also reading a sporting media pretty much unifersally tut-tutting at Perez for being too ambitious turning in on a car that was clearly better controlled and braking deeper than he could manage himself. Sergio has himself already said he was caught witn Max unsighted both times, and Red Bull Spice has echoed this.
But whatever, once the first corner elbows-out bit was out the way he wasn't on the same plane of existence. Max hunted him down with shark like tenacity and quickly dispatched him, cleanly or not. If Perez were so sheet hot when why does he let Max keep doing this?
He's running out of excuses, as are his fans. RB is quite driver-centric in that they're responsible for their own set up, strategy and tyre choice (Red Bull Spice has the final say but rarely countermands a plan pre-race once presented to him) so despite the wheedling of his three fans Perez has the same machinery, the same opportunity, and RB tend to take it in turns applying updates so neither driver is disadvantaged, at least until the title becomes a fair accompli. At RB he has more autonomy in his set up and strategy than he would at any other team on the grid, and still people moan about him being treated unfairly.
The answer is simple. He needs to drive faster. He needs to qualify on pole more often so he is the one that gets to brake deep (although he's not as good deep on the brakes as Max anyway), he needs to stop making silly mistakes and getting getting penalties, he needs to stop letting Max overtake him, then he might be a contender.