You may have crossed the line at times during your life, but you're still breathing and feeling some remorse. Cunts don't feel genuine remorse. Honestly they don't.
Those people you hurt that really know you, likely know you're not an outright cunt. They'll know you have a unique, impulsive, and dare I say, addictive personality. So no matter how low you took it. I doubt they thought they were seeing a side to you that they didn't know you had.
But ye, some shit just can't be taken back. And I bet it was you that came off worst after the dust had settled on most of your vicious, verbal assaults.
The shit you're feeling now IS the consequence of your regrets. That is infinitely times more better than having no feeling at all.
So accept, carry and wear. And keep marching forwards.