Before you know it, there’s a fan theory that suggests that Loki is the true villain in Infinity War, not Thanos like everybody else believes.
There are major SPOILERS for Infinity War and the MCU in general below, so read ahead at your own risk.
It ends with Loki traveling through space to make a pact with Thanos to retrieve the Tesseract, which leads us to the first Avengers movie where Loki makes Earth a living hell.
In all seriousness, Loki simply helped the process of Infinity War along.