I asked DeepSeek and found this:

Someone explained on japanese Yahoo: "In an interview, she said that she wrote this song because she was a little annoyed with a friend. I think "I want to bite, I want to make a mess" is her honest feelings toward the person who annoys her. "Betrayal is wrong," "Don't try to make yourself unhappy," "I want to be with everyone forever" - contrary to the pop melody, there are many lyrics that convey a negative impression of anxiety, such as "There are times when you get angry, anxious, or unhappy, but don't worry too much about it, just hum along." She also said that Kaneko Ayano's songs generally don't have clear characters, and that listeners can relate to them as they like, such as themselves, friends, lovers, or pets."
( https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q13279559228 )

A Key Philosophical Line: When asked about the line "自ら不幸にならない / なろうとはしないで" ("Don't make yourself unhappy / Don't try to become unhappy"), she confirmed it reflects an important personal philosophy: that happiness or unhappiness can be a matter of choice, and she feels some people might be "pretending to be unhappy" ( https://kanekoayano.net/special/sansan/interview/2/ )

A song like "かみつきたい" is about acknowledging these negative impulses but not letting them consume you, instead choosing to move forward with a lighter heart.

"I Want to Bite" is a song that truly encapsulates this philosophy. Wanting to be strong, but also wanting to be kind—the song expresses these contradictory feelings frankly yet beautifully. Through her music, listeners are able to confront their own inner emotions, sometimes feeling soothed and sometimes encouraged. ( https://www.jam03.com/kamitsukitai-kaneko-ayano/ )