As awful as that is, the design of those dumpsters will always lead to this. To put the bag in, you must hold the lid open well above your head (and higher than many people can reach) while holding a heavy bag of trash, then lift it even higher to get it in. If you are smaller than average (e.g. a child), physically disabled, or just not an able-bodied adult, that becomes impossible
Not to mention the design of those lids is intended to keep the dumpster closed so water won't collect and animals won't get in. They're kind of heavy, so the wind won't open them. They're also designed so at that angle, with that wide a swing, it's not easy to get those lids up at all, almost impossible to open it all the way and leave it open.
That's why they're usually built with side windows. They don't generally want those top lids to open until the truck comes.
That's actually what I was about to say to the apartment manager comment down there, but for some reason I can't reply to that person.
If you manage a building and expect average people, not employees, to put their trash into a dumpster, it's on you to make it easy for them to do that. If you're not going to, you'll end up with messes. There are dumpsters built for this purpose.
Every single dumpster I've seen has a window on the left side for exactly this reason. I can't find that exact model on their website, but others have the window on the side we can't see.
Europe to the rescue. You can make them susceptible to rain but that means you'd have to slide back the lid quite a bit which is uncomfortable and not necessary to put a bag in, there might also be a stop you have to lever away. Some also come with an additional front flap which is usually sufficient. Pedal actuator available as extra.
Switzerland is far from the only country with places using that system, I think it was the Netherlands who pioneered it.
Makes a lot of sense in high-density areas, maybe also in medium-density areas if you build them new, but switching over the existing system isn't really worth the bother in most places.