I think there is nuance to this as I see a very small minority giving up on him.
Yes, people are disappointed a 10th overall has not shown any promise since he was drafted (call it bad luck, injuries, moving to a completely new country, etc...doesn't really matter). He hasn't moved the needle towards looking like a legit NHL player.
Even his top attributes of a shot and of being physical don't seem like they will translate much into the NHL.
He has a great shot but doesn't score a lot. He hits a fair bit but he isn't a fighter, doesn't play like an agitator and physically, he is pretty average for an NHLer.
Most people seem to be like me. Underwhelmed so far but given he does have some tools, we are willing to wait it out a bit longer to make up our minds. We all hope he finds some magic and becomes a player for us.