To be perfectly frank, 1
♣ or 1
♦ makes little difference here. The combined hands were:
The comments about opening 1
♦ versus 1
♣ is a red-herring. The vast majority of the EAST's holding you hand opened 1
♣, you were the only pair not to bid game. Really. the opening bid was not the reason you didn't bid to game.
If 1
♣ was acceptible and 1
♠ then 2
♠ were normal, where did the wheels fall off? The answer can found mostly (but not exclusively) in the 3
♠ bid. This was played at imps and you were vul. Your partner is looking at 11 hcp, distributional values and a spade fit opposite an opening hand. 3
♠ is playing it too close to the vest at imps at this vulnerability. At several tables West simply bid game after his partner showed
♠ support. This hand, at imps vul, is worth a game bid I think (in fact, you have less than a 50% chance to make game after losing 3
♣ you must avoid a
♦ loser and not lose a long spade too. But still looking at both hands, game is where you want to be.
If one pretends that this is matchpoints or imps not vul, then perhaps a game invite with WEST is best. A 3
♦ game try seems more informative than 3
♠. But rather WEST bids a cautious 3
♠ or 3
♦ your hand is a clear game accept.
So of I was to apportion the blame. I would share it roughly equal. West for not bidding game or using a more useful game try, and you for your timid pass. But clearly. it would never occur to me to lay the blame on missing the game on the decision to open 1
♣.