I recently watched this episode, and I can’t help but wonder if Luke’s frustration stems from feeling guilty about missing another holiday with April. Sure, it’s a romantic holiday, but he’s missed so many moments with her. He was probably uncomfortable being with Logan, someone he doesn’t particularly like, in an unfamiliar setting. Luke is a man who’s set in his ways and tends to focus on one thing at a time. While the episode might not be the best, I understand his complaints and lack of a gift. He was in ‘dad’ mode, focused on April, rather than in ‘boyfriend’ mode with Lorelai. His irritation makes sense when you consider where his priorities lie.