We all have been through experiences when we wanted to be kind and ended up raging.
We also have been through experiences when we wanted to be kind and we made it.
The second experience was a teacher, that even though the path may not have been easy, a little bit of effort saved us from days and perhaps weeks of self-loathing.
It will take only little effort to be kind, when the world expects you to rage, that little effort is much better than compound effect of impending guilt.
Raise your standards.