Nope. Toughing up your children to learn to deal with a rough world doesn't make them more resilient.
It just makes you their first bully. And strips them of a sense of secure belonging with you.
Human beings have survived and thrived as long as we have because we have an attachment instinct. When we form close supportive bonds with our family it helps us identify abuse in others and pick better friends and partners.
Treat your children with such profound respect and connection that they find unkind, dismissive, and cruel treatment jarring and instinctively protect themselves from it.