...OK,what?
Moving on from the bit about the cartoons, I am now genuinely confused by you.
You just told me that you are purposely not bringing up erroneous play and keeping quiet.
But you want a good social experience.
You like "cooperation."
Cooperation can be defined of active assistance.
The point of a dungeon is teamwork.
Letting someone do something wrong isn't teamwork.
Teamwork is not a culturally unique concept, I don't understand how we keep trying to paint it as such.
In the Olympics, representatives from all sorts of cultures gather together as a team to get through content.
I guarantee you that they do not get as far as they do by ignoring each other and letting them do things incorrectly.
Just because this game is easy enough that you can flail your way through content doesn't mean that its how it was supposed to be done.
I drop into a team in progress on Crystal Tower, there are people speaking English, there are people speaking French, there are people speaking Japanese.
Someone says something where the only thing that I can understand is "Summoner."
Google translate says "Our Summoner has low DPS. Could you please help with clearing out the adds instead of fighting the boss like normal?"
Someone suggests to said Summoner that they should use "Bane" more when there are targets on the screen.
This is teamwork, the fact that we are in different cultures does not excuse the lack of will to be working together to help everyone get through the content smoothly.
Expecting people to work together toward a mutual goal is in no way unique to my culture and I do not understand why you keep trying to spin it as such.
Your problem is with people being Rude.
What is considered rude is determined entirely by the person on the receiving end.
If I say "let me make this easier for you,":
1) One person may be appreciative and moved.
2) One person may think that I am being condescending because they don't get it.
3) One person will think I am poking fun at their weakness and seeming inability to do the task on their own.
Regardless of the tone or intent, the person on the receiving end is going to interpret this however they will. In case 2 or 3, they may give me a response that I consider to be rude. I may find someone of your culture to be rude. You may think the point that I am constantly going back and forth with you about your opinion is rude. It is entirely dependent on interpretation. In the eye of the beholder, as someone said earlier. These reactions also exist in all cultures, while several may occur more often than others based on personal experience. Your mileage may vary.