Don't forget the sudden change to evil by doing EVERY blatantly evil thing. Not even subtle planning and manipulations and plots. Stealing people's things and being made known he did? Killing people with his own hands rather than manipulating others into it? Laughing at everyone openly after the mall failed to return?

How is any of that Loki behavior? That's typical 'I don't know how to play a bad guy so I'm doing EVIL things'.