"With speculation swirling about Marner’s status after another early start to the summer for the Leafs, the home-grown winger said on Monday that it “means the world” to play in Toronto. ...“That would be a goal,” Marner said when he was asked if he wants to stay in Toronto longterm. “I’ve expressed my love for this place, this city. I grew up here. We’ll start thinking about that now and trying to figure something out.” ... "We’re looked upon as, you know, kind of gods here to be honest,” Marner said. “Something that you really appreciate and the love that you get here from this fan base and this attention is unlike any other. You saw with the Raps a couple years ago (when the Toronto Raptors won the NBA championship in 2019), the love that they still have for a lot of those players … That’s kind of the love you want.”"
That's a pretty clear statement showing a desire to stay, and that he is open to doing so, but it's pretty funny to see you and your friends pretend he wasn't because he didn't say it in the exact specific way you want.
There is no evidence of any of that. Marner has never been open to signing in-season.
Of course he has something to do with it. It's his contract. The lamest excuse a GM can give is he wouldn't negotiate in season when he was fully aware of the situation and had plenty of time to get a contract done.
Both team and player got what they wanted once, and both team and player benefited from it. We could have had that mutually beneficial agreement again, but Treliving screwed it up.