I just saw it. Here are some notes off the top of my head.
The movie didn't work as well as it should have worked. It wasn't bad, but it wasn't as enjoyable as it should have been.
The central fatal problem is that Jane Foster is underwritten and has, literally, no personality. The corollary to that is Thor and Jane still have no natural chemistry on screen.
It doesn't take much to set up even basic character. In the first Thor movie Sif projected her strength but also her tender friendship to Thor. Remember the way she looked at him in the very beginning when they were talking at the banquet? It was palpable love that wasn't possessive. And it was touching.
In Ragnarok Valkyrie's backstory informed her bravado but also breathed meaning into the pathos of her current life. The moment that really touched me was after Thor gave her her old armour and she took a moment to say, "your highness,... don't die. You know what I mean."
These are characters. Yet I have no idea who Jane Foster is apart from her education and illness. The writer tried to make a character moment out of Jane trying to think of catchphrases, but Natalie didn't project it in any relatable way. Heck, it was hard to get the sense whether or not Jane even enjoyed having these powers. All we know was that Mjolnir "called to her". If Jane was actually relatable in some human way, or if she had any genuine chemistry with Thor, her death would have had a lot bigger impact than it did. I honestly didn't feel anything when she died because I never knew who Jane Foster was.
They squandered Eternity. Eternity is such a powerfully abstract entity who should have been part of a more profound and strange story, but he/it is written as just a generic "powerful being" and a plot device. And what the heck is this insipid notion of Eternity somehow being bound to a mortal character? That's just stupid. Stupid.
The fights had nothing new. Basic choreo punctuated with power blasts. You never got any clear sense of who might be winning or losing. I have to develop my thoughts on the matter but the fighting was uninspiring.
Thor being a clown in Ragnarok worked because, despite that, in crisis he could buckle down and be the leader that people needed. In this movie Thor spent most of the time just being a buffoon.
The ending of Endgame promised some great back and forth between Thor and the Guardians (particularly Quill), but in Love & Thunder Thor was mostly just a self-absorbed a-hole before they parted ways. It wasn't thst funny. It mostly just made me angry with what he was doing thoughtlessly to everybody else in the movie.
The children were terrible. They were just uninteresting - all of them. And it wasn't inspiring at all that they got to wield Thor's power. It was just contrived how convenient that was to pull off. You mean all this time he could have created legions of Thors to fight Thanos in Endgame? Give me a break.
The whole notion of the villain stealing children was off-putting. In the midst of a film that leaned so much on jokes about Thor's oafish nature, it seemed particularly out of place.
A lot of gags were milked a little too long - e.g. screaming goats, Thor's relationship talks with his weapons, the Matt Damon character, etc.
The notion of the team going to kill Zeus just to steal his thunderbolt wasn't heroic at all - especially since they started off by killing guards.