I didn't like how they had it happen off-screen or how they handled it. Felt like it was used for a bit too many jokes instead of character moments.
I don't have a problem with how he handled Jane in isolation. It's next to Thor or when in his world that I had an issue with it.Eh, its not really optimism so much as just doing the math. Most of us have a problem with Aaron not for how he handled Jane, but for how he handled everyone else. And in the MCU Odin and Frigga are dead, New Asgard is far removed from what Asgardia was in the comics, the Warriors Three are dead, and Thor *just* went through the MCU version of unworthy. I don't think Waititi (spelling?) is enough of a hack to retell the unworthy story so quickly after Endgame just did it (though I do expect some shades of it to still be lingering, MCU Thor isn't fully recovered yet and might still not be when the film hits). And we already know some details of the film are going to be quite different from Aaron's run, like Val looking for a queen. I expect Love & Thunder to look like Aaron's run roughly as much as Ragnarok looked like Simonson's version of the story; which is to say, not at all.
I guess you could say Endgame was his Unworthy arc even if, despite how he was acting, he was still somehow worthy. But, again, I felt part of that was just so they could have Mjolnir back in the present so Cap could use it.
You'd think that would drive him to take things more seriously and impact-fully instead of...well, how he handled it.I suspect (and this is just me guessing) that Thor traces his own blame much further back than that. If I had to guess I'd say it goes back (in Thor's mind) to Dark World and his not taking the throne (again). That allowed Loki to rule, ignoring allies like the dwarves, which lead to Thanos getting the gauntlet without contest. The "destroyer" prophesy from Age of Ultron likely hangs over him, especially considering it was proven true in later films, and Thor's failure to find a single Infinity Stone (despite having already dealt with three of them) probably weighs on him too. And of course, once he does take the throne he immediately loses his planet and most of his people and fails to keep the space Stone from Thanos (on top of losing his brother, Heimdal, etc). Whether Thor is truly to blame for these things isn't really the point, I think Thor blames himself for all of this, all of the missteps and coincidences that, (in his mind) if he had been a little wiser he could have done something about.