Apparently there are multiple studies that show a link between listening to heavy metal and being 'happier' and/or 'less angry':

  - What Makes Metalheads Happy? A Phenomenological Analysis of Flow Experiences in Metal Musicians [0]
  - Extreme metal music and anger processing [1]
  - The effects of heavy metal music on arousal and anger [2]

[1]: https://www.frontiersin.org/journals/human-neuroscience/arti...

[2]: https://psycnet.apa.org/record/1997-05014-002