All he was bad... And it's been very well documented by sports analysts. Even Barry Trotz touched on it (doesn't call him out by name) but included him in the core that he said had made improvements towards being winners.
All Marners shots were 45-60 feet out and his slot shot% was 10% worse than his next teammate. It was reported on twitter and not intended to be a compliment.
Watch his points and you'll see he isn't the line driver. His teammates are. Morgan Reilly, Matthews, Nylander, Oreilly... When he is visible with the puck it was when the goalie was pulled or on the man advantage. Otherwise he was a black hole.
He had two specific 5vs5 primary assists. On both of them Matthew or Nylander made sensational plays to draw multiple defenders and return the pass to Marner who was wide open to make the simple pass to the goal scorer.
Marner scored a few foals, all from 50-60 feet out, in statistically the worst area to score a goal. Sure.. He scored (thanks to excellent work in front by his linemates primarily) but as noted earlier your not winning a lot of big games when your 11 million dollar player is shooting entirely from the worst statistical goal scoring area on the ice and is 10% worse than ALL his linemates at getting shots from the best statistical area on the ice to score.
Moreover...vs Florida in game 2 he had turned over the puck leading to the game winning goal. In game three, he was the worst player on the ice. When the team was up 2-0 he turned the puck over 3 times in the first period alone, lead to the only chances Florida had against. In a game when your up 2-0, your best player shouldn't commit any offensive zone turnovers... Let alone 3 in one period.
In the last few years he's also turned over the puck leading to at least 5 critical goals against vs Tampa and Montreal.
He's been terrible and it's not even hard to prove.
Marner didnt turn it over in game 2 goal 3 that was Matthews
Your underrating Marner pretty heavily as production is what matters the most and marner was productive this year in the playoffs
Though it is in response to guys like dekes, not bias etc who overrate the crap out of him
The main boards had him in the 4th-8th best winger in the league convo
Kuch, pasta, and Tkachuk ahead of this year
They are very biased usually so him being in that tier with Rants (9.2M), Kaprizov (9.5M) and Robertson (7.5M i think though his was a shorter deal pre full breakout) shows he is a game breaking winger but he should be at 9-9.5M rather than 11M
He was overpaid but he has also been probably the best winger we've had in a long time.
Problem is hes like the 5th best winger in the league and 15th-20th best player but we pay him like hes the bonafide best winger and 5th best player in the league