This was a reboot
Thor 1 and 2 were some of the lowest earning / critically lukewarm MCU films.
So they gave Thor a brand new costume, wiped out Asgard, wiped out his entire supporting cast, brought in The Hulk to attract some more interest to the film, and jarringly made Thor a comedian ala Guardians of the Galaxy (also borrowing the alien planet settings).
This film isn't a director's fresh vision. It's studio-remanded reboot of an under-performing film series.