Critics will exaggerate their importance in your life. Especially strangers who offer you unsolicited criticism.
Sometimes criticism is a cry for help, or a request to be enlightened. But you might not be able to break down their wall, no matter how hard you try.
But what you can do, is plant a seed, which future circumstances may water on your behalf.
You plant a seed in everyone you interact with. Even the ones that seem totally closed off.