Did you watch him last game? I believe it was the 2nd goal Buffalo scored, they were in their zone first with the puck and Pettersson made an attempt to go at the puck carrier but went to the side of him anticipating a pass which never happened, which just let the guy open with the puck to leave his zone which resulted in a goal once they entered the Canucks zone. At least make it tough for them to get out of their zone, take the body, get your stick in there do something not nothing, that was bad to watch. Then the other play on the PP in the 3rd when he was at the point right side and should of shot and instead tried to make a pass and made a horrible giveaway and couldn't skate back fast enough to backcheck, luckily Lankinen was able to bail him out. These are things an elite player shouldn't be struggling with still, so legit criticism is still valid.
Here's a comment from a long time Canucks fan on a different site.
Petey game is driving me crazy
the puck bobbles the giveaways the hesitation to shoot. He doesn’t attack the puck carrier.
im just not impressed. And I feel I’ve been very patient and supportive. We need him to figure it out. It’s just unacceptable to me the way he’s playing still. Even with the trending feeling and getting some points. The last three games have looked brutal to me.