Instead of shooting someone, why not go to your safe-room and play with your bubble-wrap /s
Well, for a few people, they feel more empowered by taking other people's lives. It's the ultimate sense of control. A sense of power that is enabled by access to firearms without necessary background checks and ongoing certification and training.
Are their campaigns on how to recognize when you aren't able to use a firearm safely because of your emotional state? Mental health resources to call to help you de-escalate and manage your emotions better? Laws that would allow people to report their concerns to authorities so that intervention could occur?
Never mind resources that would help you with those things before you ever thought about getting a gun or getting access to one, because feelings are for snowflakes, I guess.