I’m pretty sure that’s true of virtually all players aside from the truly elite, MVP level players. The games get tighter, the opponents get better, it gets harder to score. Super elite players find ways. I don’t think anyone thinks Zibanejad is/was super elite. The whole team disappeared deeper into the playoffs. They got overmatched and outplayed by better teams. By all standards Panarin is the one who should have the talent to still break through against the stiffest opposition but he actually isn’t built for playoff hockey.
Look at me, defending Zib. Like most, I’m sick of him and his pouty faces and crying to the refs while the play goes the other way. And clearly he wasn’t good *enough* in the later rounds of the playoffs… but he also isn’t Barkov or Mackinnon or Point and expecting him to be at that level was never likely to pan out. He had a really bad, largely gutless season and has pretty much - justifiably - worn out his welcome with the fans. I just don’t like re-writing the previous history where he was largely held up as being one of the few guys who DID show up in the post season.