I'm not a shrink nor am I trying to label/pass judgement on you.
sometimes, when someone harbors rage/frustration or other feelings under the umbrella of resentment to an extreme, they may desire others to feel the same way. There is a saying misery loves company. It's not uncommon for someone who is hurting to enjoy a fictional character suffering worse (or even someone in real life they don't know). This is normal, though personally, I recommend seeking help from an adult you can trust or a mental health professional, because that lingering feeling is like a poison (for the mind/soul) that will eat a person up and warp unhealthy tendencies.
Spoiler!
In my high school days, I was bullied and came to shun socializing with peers except when necessary. I resented the tactics which are modest in comparison to what we see in Korean manhwa, but still it was hard for my high school self. I would take out my rage by being a murdering psychopath in games that promoted violence and carnage and vent a ton of stress so I woudn't have to worry about losing my cool in school (because I knew it was only temporary)