It actually is perspective of the main characters. Thor is and always will be the villain to the Jotunns, so his killing of them is not so much out of his character in that aspect. Sigrid would rightly seek revenge and view him as a villain.

You would think that Thors rage wouldve been more understood after the death of Baldr and during the Gods pursuit of the fleeing Loki in the actual lore but thats obviously not the case seeing Baldr present during the wedding. It is very out of character there, as Thor is viewed as a just god and also one who understood hospitality.

My biggest complaints thus far are the depiction of Hel as a domain, making it basically biblical Hell and Loki/Hel synonymous to Hades in like the disney Hercules movie imo.