Wakkatiti wants to be James Gunn, but he's completely unable to balance humor and drama. He's fine in completely or predominately humorous stories, but just like Thor 3, very dark serious moments are ruined by his lack of tonal blending. I like to imagine Asgardians in the early half of the movie, being torn to ribbons by shadow monsters, looking across the plaza, and wonder why there are two Thors, and why they are having an awkward conversation while people are dying. Wakkatiti completely destroys stakes and my engagement with the plot by having characters act retarded or not have real reactions to dire situations. Thor spends most of the movie as a simp or a retard. Bale carries the movie. The only note worthy performance, the ending with him and Thor at Eternity was good. Thor giving the kids all superpowers was fucking awful, and Shazam did it better.
With that said, I think this movie could be saved in the editing bay. Cut empowering the kids, cut Omnipotence City(it's better to have Zeus' lightning bolt unexplained than that detour). Cut the cringe play and goofy "Asgard is a tourist attraction. There are probably at least 2 dozen gags that can be cut to shave off a solid 10 minutes and lose nothing other than character destruction(Thor destroying the roof bifrosting out, only to crash and come right back, Jane doing almost the same. Jealous hammer, Jane catch phrasing) I think you could get the movie under 2 hours and nothing would be lost, except damage to the characters.