Loki's MCU story is a pretty tragic one to begin with, but one Marvel theory has made it even more devastating while solving one Thor: Ragnarok pothole at the same time. From the first time Loki was introduced in Thor, Loki has attempted to prove himself to his father, Odin, before that need for validation would later manifest into both villainous and heroic arcs within the MCU. Despite his best efforts, however, Odin ultimately denounces Loki at the end of Thor, causing his adopted son to throw himself into a wormhole.
https://screenrant.com/marvel-theory-mcu-loki-story-thor-ragnarok/