At least it's better than not caring about other people.
Reaper, you lack the ability for deep introspection and as a result you're one of the most boring people here.
“The world breaks everyone and afterward many are strong at the broken places. But those that will not break it kills. It kills the very good and the very gentle and the very brave impartially. If you are none of these you can be sure it will kill you too but there will be no special hurry.â€
- Ernest Hemingway
Huh, ours are so different that I can practically post it's opposite as my answer.
Yes, but not quite over "doing fucked up shit to other people". I see most things anyone does as wrong or not good enough on some level, regardless of what it is. So, when applied to myself, I often hate myself over not being able to live up to my own oppressive standards despite recognizing that any grief experienced over it roots from myself instead of anything external.
I view self-loathing as a form of self control and a reason to desire improvement. It keeps me trying harder when I always recognize how I could have done better, it keeps my behaviors in line (even if faulty outcomes soon feel as bad if not worse than what I was trying to avoid), and taking it out on myself has helped me become that much more resilient against those who can't insult me as harshly as I insult myself. Through hating parts of myself I can desire to become better than myself, and by having the self-hate be constant I'm less likely to find a reason to stop.
The main downside of it really is that if an outcome occurs I didn't see in advance after bothering to try to predict possible outcomes, I take it out on myself for not having seen the possibility earlier, plus I can't really ever 100% relax. It's hard to like yourself when you make yourself uncomfortable constantly, even if said discomfort brings results on occasion.
Some people with certain chemical imbalances feel non-guilt related self loathing without allowing it. But I also don't understand how anyone could allow themselves to feel guilty and then take it as far as to hate themselves. Guilt, like so many other painful habits, is just self destructive behavior.