To end 1 month relationship over this tiny thing

It’s not a tiny thing.
You're not overreacting.
You’re not being dramatic.

Throwing it out sneakily, hoping you won’t see, would be bad enough but you actually asking him not to, and him going ahead, is an absolute red flag.

I’d dump him. I used to hike a lot in the London area and all the main roads were littered with stuff from cars, particularly near Heathrow. Nobody ever picks bit up. It stays forever, and accumulates.

Yes I’d end it.

How disrespectful both to you and the community. Agree with those saying this is just the tip of the iceberg.

@bicyclecrash Yup, I'd show him how things should be binned by starting with him. It's bad enough that he would do this at all, let alone after you'd explicitly asked him not to.
Sorry OP, but I'm old and remember the "Keep Britain Tidy" campaign on black and white telly back in the day, so I'm pathologically incapable of throwing even a receipt on the ground. It's literally no hardship to either look for a bin or take your rubbish home with you. I just don't get it when people are this careless. Imagine if we all just threw our rubbish out the window or dropped it on the ground?! Nope, just nope. YANBU and he's got to go.

That’s not a ‘tiny thing’, it would be over immediately for me. He’s shown you he’s a complete moron, so he’s done you a favour at this early stage.

Not a small thing. Get rid and move on.

He doesn't respect the environment.
He doesn't respect you having very basic expectations of civilised behaviour.

Dump him like a used drinks can.

1. thought about littering
2. you asked him not to and he still did it

ICK

He is telling you exactly who he is. Trust your instincts here. He isn't your person.

Get rid!

You both have wildly different values. Save yourself time and future heart ache and end it now.

This will be the tip of an iceberg. Trust me.

Definitely dump him

Have a serious chat with him. It would piss me off too. It’s disgusting.

YANBU. I'd have stopped the car and thrown him out the moment he'd done that and blocked his number. That's disgusting, disrespectful and tells us exactly the kind of uncaring, selfish and arrogant tosser that he is. No second chances or apologies accepted for that kind of utter moron.

It’s not just laziness he’s done it for a reaction.
If you let him ‘get away with it’ there will be something else soon.
He knows most women (all?) would really not like this and he’s done it as a power play especially seeing as it was your car.
Been there, got the t-shirt. I was really young and it wasn’t long before he threw a fresh, hot takeaway out of a car window at me. His car, he drove off leaving me in a seaside town late at night.
It is not about the can. The can is just a reflection of who he is…

And it’s not tiny - its huge

Only a really scummy person would do this.

No you aren't over reacting. I wouldn't want to be friends with someone who did that never mind in a relationship. Yuk.
Your values are not aligned and luckily you have found out early enough.

This is word for word what I was going to say!!

Slovenly inconsiderate selfish skanky fucker dump his littering arse

Yes, dump him. It showed disrespect for you, disrespect for others, disrespect for nature by littering, and no care that you could actually get in trouble for that. If he doesn’t have respect, it’s going to continue to manifest in other ways. You MUST demand respect from a man and NEVER SETTLE FOR LESS if you want to end up in a good relationship and harmonious home one day. This guy is a jackass. Think of it. Would a gentleman impress a lady with this behavior? It’s not a small thing. And why isn’t he picking you up in his car and opening the door for you? You get the treatment you will accept. If you accept this, you’re setting your own low standard.

I agree, hideous. Tells you so much about a person.

I was at a theme park with an ex and, instead of walking a few hundred yards to one of the hundreds of bins, he dumped a full Burger meal bag and contents on the middle of the path, where dozens of people were following. I was so embarrassed as I picked them up to dispose of properly. Our respective young children were with us.
Huge red flag.

Just tonight as I was driving home, I saw a knobhead pedestrian chuck his bottle over a bridge. He was with a woman and child.

Don't be that woman OP.

Not tiny, total scum. Dump.