Figured since you liked the opening theme I'd send you a link to the official video, though this one has lyrics at the bottom. The band is called Fear and Loathing in Las Vegas, though honestly I dont know if they based it off the Depp movie or the book by Hunter S. Thompson that the movie was based on lol. Interesting to note is that the part where the song shifts and starts talking about Maslow and the book he read before is he's referring to Maslow's hierarchy of needs. There are a lot of covers of the song, Amalee even does one but since this song is mostly in English I just figured I'd send you a link to the original lol.
https://m.youtube.com/watch?v=8yTpGtGuSXU