My neighbor is from England. She married an American and I have another friend from England who married an American in order to stay here. I don't know what quotas you are talking about but if you talk to a European, you will find out how hard it is for them to come and stay here. Every European that I know that has immigrated here has married and American citizen. I know many people from Japan who also want to come here and can't. My friend is being sent home and she wants to stay and she's from Japan. I had another friend who was working here, but they wouldn't let him back into this country after he went home to Japan for a visit. Almost all of our immigrants not married to an American citizen are from 3rd world countries. I can't think of one of them from a first world country that isn't married to an American citizen and I know lot's of immigrants.
I do know an immigrant from India who got into England first but then was able to come here. Maybe he counts as one of your "quota?"
That every European immigrant you know came here by marriage does not mean that it is nearly impossible for immigrants from Europe to come here by other means. That logic simply does not follow. In fact, saying every european immigrant you know came by marriage is totally irrelevant.
It could simply mean that:
(a)Europeans generally dont want to immigrate to America, but will do so if they find love here
(b)Your experiences are anecdotal and limited
Why do you put quota in quotes? You do realize that is how our system works, no? Each country has a quota of the number of immigrants who can come here. The quotas have generally favored European immigrants, actually. Again, please point me specifically to what makes it harder for Europeans to come here than everyone else. The fact that the UK does not even meet its quota is evidence that no such law exists.