My long term gf got a tattoo I really don’t like. She ignored my opinion and left me out for the whole process. Is it wrong to be mad?

Long story short my gf was interested in a tattoo I was not behind. I don’t mind tattoos, she already has 5, but I’m a little more picky about larger pieces and where they’re placed. She had a concept in mind and was considering a couple different places, but a half sleeve was her first choice. I told her I wouldn’t mind the other 2 places she chose that much, but I wasn’t crazy about the half sleeve. She had her appointment today, which I found out about hours before she was meant to go. I never even got to see the design before she went ahead and did it. And of course, she chose the half sleeve. She sent me a picture about halfway through it and I really don’t like it. I feel bad for saying that, but I just don’t think it looks right on her. She’s small with pretty small arms and I feel like it’s too much where she put it. Plus the design was mediocre. This was a free half sleeve she won from a contest, so that should tell you what kind of quality we’re dealing with. If she had gotten my opinion, I would’ve told her to save something like that for a good artist because the artist was not good. I’m just annoyed that we’ve been together 3 1/2 years and my opinion means that little. She didn’t even bother to show me the design. It’s her body and I get that. I can’t control her and I’m not trying to. I just feel like if you’re in a long term relationship, you should want the opinion of your partner when it comes to a lifelong decision. Am I wrong for feeling that way?