Wikipedia is a legitimate source for preliminary research. Certainly there are false statements on wikipedia, and there a statements/articles that are misleading because they are incomplete. I imagine that if this site were subjected to the same level of scrutiny as wikipedia, we'd be found guilty of the same offenses. I find that both sites are useful to me in understanding history, and I read both of them with the same skeptical eye I use for any non-authoritative source.
On the other hand, there is a reason why I have 17 times as many answers as questions. Good questions need to demonstrate preliminary research, need to show that they are non-trivial, that they can be answered, and that they can be answered in a way that meets the expectations of the site. I don't think it is "very hard to meet the site's standards"; I think the site needs to impose some standards to keep out spam, and to ensure that we understand the context of a question.
We'd love to have you stay and contribute; we'll exert reasonable effort to assist you in crafting and revising questions. But the truth is that there are too many questions that are unanswerable (or that should not be answered) because the author is typing them in a stream of conciousness mode without any effort to do preliminary research. They are a bad fit for this site and they pollute the site. The requirement to do/show preliminary research leads to a stronger site with higher quality answers. If you despise wikipedia, then provide other sources.
I believe we could do a better job of assisting users to revise questions. I believe we also need to accept that having a question put on hold for revision/reedit/reopen is perfectly legitimate. Finally, I believe that downvotes are merely expressions of opinion.
If you feel that a reference to wikipedia, invalidates the site, then by all means, follow where that leads you. If, on the other hand, you're interested in history, interested in learning, and interested in understanding our past and how we got here, then please reconsider and assist us in developing a higher quality site.