Is this a masterpiece?

Rating: Null/10 (28 December 2017)

Pretty cool cast, and interesting premise muddied by oddities, implausibilities, and a juvenile sense of story. Is this a film set in a world where crazy stuff happens as a matter of course, or a normal every day world where crazy stuff happens every now and then? In this film, I see pretty normal people doing normal things and having normal things happen to them, so why is it the writer/director chose to litter what could have been a very good film with SO much bizarro bs? And with literally ZERO character development?
Three giant billboards THAT close to the road and THAT close together - I've driven all over the country and never saw that. Billboards in rural areas tend to be smaller and definitely not that close together for obvious reasons.
WHO is this woman, Mildred? We know literally nothing about her beside the fact that her daughter was murdered. Eventually we find out she's divorced and has a son who lives with her, but if one is to care about the protagonist, character development is crucial. As it is, it's interesting to watch her do and say crazy stuff, but I couldn't care less about her.
WHY is it, two male characters directly related to the protagonist have a girlfriend & wife 20+ years their junior? Do they live in a part of the country where such a thing is commonplace? What are the odds of that? Probably about the same as if your dentist won the lottery but then your mailman did also. Yes, possible, but very, very odd and distracting.
Why does Willoughby's wife have an English accent? Was he in the military and met her while overseas? Is it common for a small town in Missouri to have British accented residents? If there was ANY character development, maybe we'd know these things. As it is, it's distracting and elicits questions that shouldn't have to be asked.
$5000/month for three previously forgotten about, decrepit billboards on a road people don't use anymore? LOL. For someone who is supposed to be a savvy, tough, non-nonsense older lady with the wisdom of the Buddha, that's pretty dumb.
A cop smashes office windows, assaults a man and throws him out a 2nd story window with no jail time. Really?!
Why does Willoughby have fatal cancer? Seems as no more than a cheap device used to heap more disdain on Mildred. Yawn.
Dixon ends up in the same hospital room as the man he assaulted? Is that supposed to be ironic? And again, what are the odds?
Mildred firebombs the police station, nearly kills a cop, and then just says "I didn't do it" and that's the end of it?! Really?
Some creepy stranger visits Mildred in her store and harasses her, THEN is overheard in a bar talking about committing a crime, maybe the crime in question, but alas even after Dixon cleverly retrieves dna from the guy, it turns out he's not even a local, and wasn't around when the crime occurred. Why then does the creepy guy know so much about the crime in question and WHY is he harassing Mildred!?!?!?! WHY?
Then to top off ALL that nonsense, Dixon and Mildred decide to go murder the creepy guy anyway, LOL, how profound.