You want out, this is a logical consequence. If the U.K. maintains its stubborn attitude you have only yourselves to blame. Bed, lie, in it.
I think you’ll find that vast swathes of us are more than happy to maintain a ‘stubborn attitude’ as you put it. The EU stands to lose a hell of a lot more than the U.K.
In reality, there is a zero percent chance that air travel into or out of the U.K. will be affected in any meaningful way at the end of March next year. That said, I’d personally be delighted to see HMG take a firm line and block off U.K. airspace and airports to all EU registered aircraft. Got to make sure all those airlines (LH, KLM, AF, RYR etc. are compliant with U.K. regulations after all, what.)
If the EU wants to play these silly games, the U.K. should show that it can happily push back.