The things that some of them soy out about Japan used to be normal here as well prior to mass immigration:
What's funny is that once in a while someone goes to Japan and then talks about how wonderful it is. How they can walk around in a minidress in the dead of night and no one bothers them, that they can doze off in the metro to their hotel and wake up unmolested. But if any redditor dares to suggest it might have to do with the composition of the japanese population, mods are quick to intervene. Funnily enough, none of them complain they miss that wonderful Ethiopian cuisine the west is enriched by.
I grew up in a village with just whites. I was always confused people complained about representation. Sure, most people on TV are white, but that's how it is all around me. Then I went to the city and saw a minority of whites. I think that explains part of the leftist brainrot, they are surrounded by sexual deviants and nogs, so they think that is how reality is everywhere. If your city is 30% white, but TV is 90% white, you think the TV doesn't reflect reality. If half your friendgroup assfucks other men and wears dresses, you think there are countless trannies everywhere and there is just a small crazy minority still saying most people just want to have a normal two person heterosexual relationship between consenting adults (male-female).
As for your other points
1) I remember in the summer we would leave our windows open on the ground floor to let cool night air in. Tool sheds were left unlocked. Then one day there was a break in on the other side of town and we had to remind ourselves to always lock doors and keep windows closed. One time we had a roving band of gypsies (thanks schengen) looting every tool shed they could break into. Of course the police didn't want to raid their camp to recover the stolen goods.
2) constant loud music and people setting their phone to speaker, then shouting gobblygook. In the years I had to use the train, I could see the entire thing deteriorate in real time. Now, once in a while, i see news articles how train conductors get beaten up and women feel unsafe and wonder why nobody comes to help them.
5) funnily enough. My father is casually looking for another job. When he was first looking for a job there was a worker surplus. Now there is a deficit, and he's shocked how he's being treated like trash. One recruiter was shocked when he asked for travel compensation to go to the job interview, thought it was some old man lie that that used to be normal.
6) the entire middle segment of goods is ruined. You either get temu quality, or pay 5x normal price for the premium stuff. Everyone complains about it, buying the "middle" quality goods just means you paid someone a fat margin for alibaba garbage he dropshipped himself. The solution people came through is to just buy multiple units of the same good so they can replace it quickly.
7) the government sure loves to push plastic money too, their pet rapeapes blowing up ATMs is the perfect excuse to phase out cash
Most Western countries are now at 20-30% foreign born, let alone 2nd generation immigrants.
It fucks with education as well. They don't know there was a time when you could have proper classes at a decent level. All they're used to is dumbed down lessons and teachers spending half their time pacifying the browns.