Sisyphus0

The issue with your result really seems to be the play 6H is a pretty iffy contract at best and has no play on this layout without the diamond lead. Your opening is flawed in my view though because you have primes outside of your suit. You have an Ace or so too much. Partner can have rather moderate hands that would be virtually cold for slam. Opposite the right 9 point hand you would be happy to be in a slam though constructing an auction to get there would be undoubtedly convoluted. This hand should be thrilled if the auction for example goes 1H-2D. (Opening 2C on these types of hands is execrable bidding and should be punished at every opportunity. It's the kind of thing that shouldn't even be mentioned in front any impressionable youth.)