welcome to the bridgebase forum SirSatai.
I edited your post because you had the contract as 3
♥XX by north, it was 3
♠XX instead.. which probably why you didn't get any responses. I also deleted where the hand was played, as from that people could look up who directed, who opponents were (etc) too easily.
3
♠XX is a touch and go contract. In fact it can make. In fact the line you choose could have gone down. However, at the point the play stopped, there is no line on which you would be set. Here is the hand with bidding and play...
West North East South
Pass Pass 1NT Dbl
2
♥ Dbl RDbl 3
♠
Pass Pass Dbl RDbl
Pass Pass Pass
D9 D4 D6 D2
C3 C4 CT CK
CA C7 C6 C2
H5 H2 HK H7
HA H9 C5 H3
S3 SJ SK S4
S5 S2 S6 SA
DA D3 H6 DT
At the end, East (on this layout), discard a heart (mistake, pitch two clubs, and partner lead club.. if norht ruffs, you overruff. If north fails to ruff, you pitch a heart, a red card has to be lost).. As everyone can see from this four card ending you can no longer go down.....and the director made a huge mistake.
You lost 5.38 imps for minus one... you could have scored +760 instead of minus 100, and the imp swing is enomous. Recalculating the results would give you +12.3 imps (a swing of 15.5 imps).
Of course, bridge is timed game..so both might deserve average minus, but if opponents were slow to avoid the minus 12 imps, you should be awarded +760