. What kind of things frustrates you in daily life? Do you know what to say

We can always meet something makes us frustrated.For example, we study hard but still fali the test,we help others but are misunderstood at last...... Take myself for examle, I was rather disappointed last weekend. Do you know why?
It was a sunny day and I finished doing all my homework. How happy and relaxed I was! Then I began to watch TV .Later I found it boring. At that time I remembered my best friend. "What about going to see a movie with her?"I called her.However, after replying me ,she answered very coldly:" Don't bother me! Can't you make me free?" I was so frustrated that I could not do anything.Why was she so cold?Was there anything wrong with me?

在日常生活中，什么样的事情让人感到沮丧？你知道要说什么吗？