“On the verge of?suicide, an insecure teen?is?expected to care for her alcoholic father during a quarentine but when?her father is forced to spend time in close quarters with her polyamorous lovers she must keep the peace to keep them safe and inside before one, or all, of them break out of the apt complex and become exposed to a mysterious illness.” (65 words)

There is too much background at the beginning which can be integrated into the description of the main plot. The description of the character’s flaw doesn’t seem to add anything to story, whether as a character flaw or as a skill she can use to accomplish her goal. Also, the conflict is unclear, and makes the characters seem illogical. If they all know about the illness and that they’ll be infected if they leave, why would any of them leave, no matter how much conflict they have among themselves?

The logline is described as horror. So what is the horror element? What is the character or force that causes the horror?
On another note, how does this concept differ from multiple other infection movies? Zombie movies? It seems like yet another movie about uninfected people trying to avoid being infected, and the main character have conflict between themselves. What does your concept offer that’s different from what’s already been done?
And, as Nir Shelter pointed out, what is the specific goal? What must she accomplish or fail at for the conflict to be resolved? ?A logline should describe a clear, visual action, what a viewer would see on screen, what a producer would be able record to put on a screen.

I hope this helps.

What’s the difference? Someone who is suicidal is someone who is suicidal, despite age or their life experiences. Teenagers and other young people are the ones more likely to commit suicide, or consider it. What about the fact that she’s a teenager means her being suicidal makes a bad character, a bad story?
To go back to Martin Riggs, he is suicidal and he’s a cop. A cop, someone who helps people everyday. He cares about Murtaugh and his family even though he’s suicidal. As dpg said, suicidal is someone who is likely to attempt suicide, has suicidal thoughts. While it doesn’t mean exactly the same as “lost her will to live” it encompasses that and since author of the logline described her as that, is likely to more closely encompass her character.
I just don’t understand why you see a teenage character described as suicidal as such a problem.
One more?note, you mentioned that an audience may not sympathize with her if she’s described as suicidal, and while I don’t really agree with that I want to point out that?empathy is a much more effective thing to create for a character. ?As long as the character is interesting and the audience understands why they do something, no matter how bad it may seem, how unlikable they are an empathetic character will keep their attention. I’ve mentioned before the film Nightcrawler. Lou, played by Jake Gyllenhaal isn’t sympathetic, he does things that most people wouldn’t agree with and view as bad, but the audience’s attention is kept because we understand why, we?empathize,?and he does have some sympathetic traits. (Again, I recommend the great video essay which discusses this.)
Now, taking a look at the logline, it is labelled as Horror. So, depending on the action the protagonist goes does to pursue her goal, suicidal may not be the best trait that will make a compelling Horror story. Because the conflict in?Horror movies is often created simply because the protagonist(s) wants to live.?But I just don’t understand why you see describing a teenage character as suicidal as such a bad thing.