"You want the rainbow, you gotta accept the rain"

Self-deprecation isn’t a healthy coping mechanism. Coping mechanism? Yes. Healthy? Absolutely not. Saying bad things about yourself seems harmless or even good in the moment but if you do it enough you will reinforce negative beliefs about yourself and the world around you. Say “I’m the worst” enough times and you will believe you’re the worst. Say “everything sucks I should just die lol” enough times and you will come to believe that too. 

I’m not pulling this shit out of my ass either, by the way, this is coming direct from when i was an outpatient at a psychiatric hospital, way back when i did this EXACT THING CONSTANTLY and ended up suicidal. This is what I was taught there, and this is how I dragged myself out.

The best way to combat this (very unhealthy) coping mechanism is really just to force yourself to say good things about yourself, and shut down the bad ones. It feels stupid, it feels like you’re lying, it feels like it will never work. But over time, if you keep at it, and with the help of friends, the new words will replace the old ones.  If you replace “i’m terrible” with “I’ve made a mistake, but that doesn’t make me a bad person” that is what you will come to believe, and make it 1000% easier to actually fix the problem because you won’t be bogged down with self-hatred.