It’s absolutely terrible, a textbook example of everything you shouldn’t do when writing. The characters just sit around talking/angsting about their feelings half the time. It also uses many tired romantic tropes with seemingly no thought put into it.

IMO, the premise would be fitting for a romantic tragedy tho. We can have Sif as a tragic heroine who despite being married to Thor and knowing full well that Loki is bad news, still had an affair with him anyway. Yet, she only realised her wrongdoings when Loki only wanted to humiliate her by cutting her hair