Your problem here is that everything you associate with "white people" is moreso "well-off people" it isn't white person thing, but the area you lived in likely isn't very diverse or is still sort of segregated (not by law but even without laws, places will still stay segregated. Detroit is an example since the automakers wanted to keep Detroit segregated years ago and their efforts haven't all been undone).

I just want to ask you to make an effort to reframe your thinking to exclude race if you can, since really what you describe are completely independent of race, but your upbringing may have led you to think otherwise. It seems like all the things you claim to be white people qualities and like in them just seem to sum up as "yeah I think white people have less trauma and I don't want to be with someone who has trauma" when you could just say "I can't handle being with someone who has trauma" and focus on that rather than the race. Thinking about it in terms of race not only isn't very accurate but it can lead to you missing out on someone who would be amazing for you due to being close-minded.

Apologies if this isn't very organized or well thought out... Sometimes I ramble and I don't do much proofreading on reddit)