I'm not a judge, and I'm not even a skilled player, but to declare a technical loss in this situation is complete nonsense and unfair. Moreover, the rules clearly state that if the increase didn't affect the course of the battle, it's not a rush.
Celebrating an undeserved victory under these circumstances says a lot about a person.
And yes, in my humble opinion, the rush rule is an anachronism that should have been abolished long ago.
The main thing is that you are a thoughtful and fair player! And skill will come with the right approach to the game ;)

