Nobody is making excuses for shitty behavior, they're saying that if you interact with enough people you'll encounter shitty behavior because there are shitty people in the world. When you go outside just be ready to carry on with your life when you encounter one of these.

Statistically speaking, the likelihood that there's an asshole somewhere that you'll run into in the course of your lifetime is near 100%, so it is some natural law like gravity. Do you have a proposal for a solution to this problem, or are you just calling people victim blamers for acknowledging that these people exist?