I think that the reaction is totally genuine for a teenager
I was just coming in to say this.
God bless the folks who survived my teen 'tude. Ugh. I was like a less-appealing Godzilla. Seriously, I cringe at how incredibly selfish I was. I'd especially like to take this moment to apologize to my step grandmother who graciously hauled my petulant ass across the country in a car to introduce me to her Kansas relatives (from CA!) so that I could feel more like family and get away from my accursed father. She was a saint and I was very Kurt-like. It was as if I was chemically compelled to situational deaf-muteness.
That said, I am with Morgana on the Kurt-His Dad relationship. It really is my favorite, so I hope they resolve the conflict soon...with a duet!