AITAH for telling my gf (F27) that’s she’s ungrateful towards me (M29) for complaining about not getting flowers on Valentine’s Day

I’ll keep this as short as I possible can. For Valentine’s Day/our anniversary, I planned a trip out for my gf (F27) and I (M29). It was a nice 5 day cruise, and we did a bunch of different activities and had some nice dinners, genuinely a good time. I paid for all the expenses of the trip. Few days after we got back, she reposted a tik tok complaining about the fact that some other girlfriend didn’t get flowers, and this girl in the tik tok was slandering her bf.

The next time I saw her, I asked her about it and she said she agrees with the TikTok and said that I should’ve gotten her flowers because that’s just the right thing to do. I told her that I agree that boyfriends should almost always get flowers, but then I said that I should be cut some slack because I just paid thousands of dollars for us to go on a nice trip. She got very argumentative and said that it doesn’t matter and that flowers is always a must. I told her it’s invalidating all the effort that I put into the trip, and that she’s being ungrateful. Since then, she’s been giving me the silent treatment and not really talking to me. So Reddit, AITAH?