I mean both can be true. Guyton can be better but the NFL refs are junk and nothing more than NBA refs with how they love the spotlight and to control outcomes of games. Guyton is spot on. There was a hold called on him where the lineman fell down and Guyton was barely touching him. NFL players love to flop and sell calls these days.
Meanwhile on the other side of the ball, anything under manslaughter is allowed against Parsons. Sure, the refs usually throw a flag on a meaningless play to have it show up on the stat sheet against Parsons. And I am not even a fan of the guy but it's obvious how often he is held.