Girlfriend not taking isolation seriously

It's such an annoyance, it's like she doesn't understand the point of it. The other day she said "I like socializing when I'm like not supposed to", after we got tested together for showing symptoms and got told to self-isolate. She justifies how she acts saying "we probably don't have it anyway", and "if we have it, then everyone else in our flat is fucked anyway right?", but the attitude shows such a lack of consideration for everyone else, just because as she puts it, "self-isolation sucks".

During our nationwide lock-down she fought for her friend to move in halfway through because she "wanted company and friends outside of me", which is fair, but I would've loved my friends to come stay with us too, but we were on nationwide lock-down.

Now she's hosting flat viewings to find a new flatmate after being told to self-isolate, saying "I'll just come out and say hi and [her friend] can take the viewings" because apparently it sets a bad image if she doesn't greet them so she has to greet them. We're not meant to be having them in the first place but alright. Then she goes and sits down with them in the kitchen to "interview them" and find out if they're a match.

We also got told to isolate from our other flatmates already here when we got tested, of course, but again, "if we have it, then everyone else in our flat is fucked anyway right?". So she got drunk with them all and started cuddling her friend and partying with everyone. I can't even bring that up, I went too because she went, and asked the flat ahead of time if they'd be comfortable with us being there. We never told them about anything the nurses told us though but still, it's misleading to not mention any of it. Sure some of that's on me as well though, but she's taking no precautions.

She just keeps showing such unrestrained disregard for the situation and isolation it's annoying to me. But when I bring it up and tell her I don't think she should be doing this and that, she says I'm "attacking her" and asks me to leave because she doesn't like being judged but I just really don't like how she's responding to everything. I call it selfish and inconsiderate, she says I'm just judgmental, maybe it's a bit of both I can compromise but she won't, and I can't stand it.

She even criticizes others who break quarantine saying it'll be their fault if lock-down gets extended, but doesn't take responsibility for how she's affecting things.