I'm not allowed to disclose the ending, I have a real problem with Judd Apatow, and I'm old fashioned in that I think comedies should be funny.
OK, three problems.
And it's too sodding long.
Right, four problems. I'll stop now before the list becomes the whole review.
So which one to start with?
Let's start with Apatow.
Now, I hated This Is 40. Billed as his 'all grown up' film, it painted a loathsome picture of a bunch of loathsome people. And as I was hitting 40 the year it came out, I took real exception to the way my age bracket was being portrayed.
Trainwreck is actually worse.
The premise is essentially sound - Amy Schumer plays a woman who is quite happy to be dicking around, getting wrecked and shagging anything that sits still long enough.
And at this point, I have no problem with the film.
That the central character is perfectly happy with her lifestyle is actually a very positive message to send out.
Not that she SHOULD be living that way, but that she CAN if she so CHOOSES.
She's also a journalist. And this is the first hurdle at which the film falls.
While trying to satirise the junk and crap that passes for popular magazine fodder these days, it's clear Schumer (who wrote this thing) has never spent any time around the real people who create them.
What you get is a bunch of cliches and bullshit, and an editor played by Tilda Swinton doing an impression of Gillian Taylforth playing latter stages Kathy Beale.
It actually took me a while to realise it was Swinton.
Then I spent the rest of the film wondering what the hell had caused her to agree to being in this car crash of a movie.
Elsewhere, we have celebrity cameos - including LeBron James.
We know it's LeBron James because LeBron James keeps mentioning that LeBron James is LeBron James.
LeBron James likes talking about himself in the third person.
We also have Bill Hader, playing a sports physio who seems to spend as much time in a hospital as he does treating LeBron James.
A man who is such a massive star you just know Miami Heat would not be worried about him getting treated by a guy in an office somewhere rather than their extensive team of health folks.
No no, that would be fine.
I mean, Schumer's researched this stuff, right?
Then there's the jokes.
The opening 10-15 minutes are faintly amusing, with lots of smut and sex jokes. But after that...
Let's just say subtle wasn't one of the words used by the test audiences.
We also have the small matter of her dad having MS.
Not for comedic purposes, as far as I can tell. Not for drama. It seems to be a condition that wouldn't cause too much offence as no one knows what it is.
You can almost hear the meeting where it was decided they couldn't use cancer (been done, Amy) or Parkinsons (too Michael J Fox sweetie).
MS? You mean Microsoft? Oh, it's a real thing? Let's go with that!
When it's first uttered (and, OK, I know I might be a smidge sensitive on this) it really leaps out. I mean slap-in-the-face leaps out.
The fact it doesn't go anywhere makes you wonder why him simply being 'ill' wasn't enough. It's not like attention to detail is a watch word here.
So, after 15 minutes of smut and an editorial meeting staffed by clowns, the love interest arrives and the plane finally takes off.
And splutters and stalls for another two pissing hours.
Christopher Nolan can keep me in my seat for half my life, that's fine. He's got big ideas and an ability to make a film look good even if it doesn't make any sense.
He may be trying to be a serious film maker, he may have an ego the size of Florida, but look at his catalogue.
Ideally 90 minutes, and he's done. It makes some people laugh.
Two hours is stretching the sketch a bit far. The jokes get fewer and further between. And less funny.
It's the law of diminishing returns.
So you can imagine what two hours 20 mins does for a film.
Throw in an ending that has you spewing bile and expletives at the screen, and you have quite the rom-com date movie.
Just try and forget the fact you paid money to see it.
(Do I get a brownie point for avoiding the obvious title-related joke?)