FD
the KLM episode was a while ago and yes, you are correct that I used China last year and have now voted with my feet on that one as well after the way they treated (abandoned) pax during the ash cloud problem.
It's not a case of spitting the dummy or throwing tantrums, just letting companies know that if they mess me about I simply won't use them again. CI will lose out on 10s of thousands of £££ over the next 20 years or so. I told them that but they weren't bothered.
I now use EVA who are great. I also see they go from AMS so maybe one day I'll pluck up the courage to risk the KLM hop and book an extra night in Bangkok before moving on to let my suitcase catch up. The timings are still tighter than I would like and I can't tell you how low stress my last couple of trips via LHR have been with everything being so much more predictable.