No, of course not. I even agree with everything you've just said.

[ She realizes she's picked a pretty stupid war, but she's ready to die on that hill. Urgh. Just when she'd started thinking perhaps she would be able to get along with him. ]

But words hold power. If you're not using the word as an adjective, then why use it? [Sorry, that's very important to her.] And that's not just about me. I won't stand for your own feelings to have the word "shitty" attached to them. They deserve more respect.