The Pens don't need extra reasons to complain about officials; it's in their DNA.
Sullivan was bitching about the non call after the Pens player had his helmet ripped off. Okay, fair(ish), but the player stayed to petition for a call. If you want to blame confusion for Mika's tying goal, maybe your player needs to stop wasting time trying to do the refs' jobs for them.
To be fair, I complained (A LOT) about the overturned goal in Game 1, but felt that Dumoulin's contribution to Kakko's path contributed to the contact. That wasn't a tough call at real speed and they had the benefit of replay, and still missed that contact.
Where I still complain about the officials is their inability, and almost disinterest at times, to get out of the way of the players and pucks on the ice. This transcends team Fandom, it is a big problem when they are creating turnovers at the blue line. Players anticipating entry/exit are either put offsides or put themselves out of position anticipating a breakout. In one of the west conference games, a defender went behind the net followed by a forecheck; who shows up in that space between the boards and the net? The friggin' ref. Only three people on the ice below the dots, and that moron headed to the only choke point. WHY????