I remember watching a video that compiled clips of anime's where the main character gets back at the bully. This cropped up and I tried the series. Honestly, I really really enjoyed it even though it's a 60% average. The story was so dark and I loved how brutal and foreboding it was. I watched this years ago though and my tastes have changed so I don't think my opinion would be the same if I rewatched it
Here's one of the characters that had me hooked at the time.
https://anilist.co/character/191686/Nana
The trailer definitely does a good job at portraying the bullying that made this series so dark and twisted
https://www.youtube.com/watch?v=ywv_moZemPk&ab_channel=avexpictures
I understand where you are coming from. I think rather than having music integrated with anime it would be nicer to simply have an additional section on your profile to record music videos. Although, I appreciate that music is only added if the video has sufficient animation so I suppose it would be a bit strange having that extra section. Definitely needs a rework in my opinion.
On a side note, I would love to see another section in each animes page called Music or something that not only links a YouTube link to the opening and endings but has the romanised and english lyrics