Most people would not be happy sitting around all day waiting for someone who never arrives and so the speaker is sarcastically glad about how they are wasting their time.
Context: "Water is not working in the house and I have been sitting here all day waiting for the plumber to show up."
Hypothesis: Glad how I have been sitting here all day waiting for the plumber to show up and fix the water issue in the house, but nobody has arrived yet!
Based on the context, is the hypothesis true, false, or unknown?