Seated next to Karen, I tried to keep calm but felt the tension mounting. Her incessant grumbling grated on my nerves. I took a deep breath, hoping to find a moment of peace, but Karen’s voice cut through the cabin like a knife. “This airline is the worst!” she announced, looking around for agreement. I glanced at the other passengers, and we exchanged sympathetic looks, all united in silent solidarity against Karen’s tirades.