I agree with what people have said here, that was a bit crass....
She should have been grateful to receive flowers, even if they're not her "thing", as you put thought into it. If only out of politeness, she shouldn't have said anything, and giving them away is even worse! Maybe it was just a thoughtless moment and she will regret doing this, but she seems very ungrateful to me. It's not like it's something so expensive that she would have to really like it, and could politely say that she would like to have another model or something as she finds that it is such a big present she would like to have it fully to her taste so she can use it everyday (a piece of jewelery, for example). It was flowers, and a lovely gesture. I'd be gutted if that happened to me, and you're right to be miffed.
PS: Whiskeyshery, what an unbelievale d!ck that boyfriend of yours was!!! lol