Before I start, let's get something out of the way:
So long as they have the appropriate privilege, a user can downvote a post for whatever reason.1
Though you haven't explicitly stated all of them, I am going to address a few of what I presume are your concerns:2
What is Super User supposed to be about?
I asked if something was possible and my ...
To answer the implied question of "why?" when you say:
And now I cant ask a serious question!
You have what is known colloquially as "history". Specifically you have a history of asking bad or off-topic questions.
You have asked, in total, 10 questions on this site. 5 of those questions were closed, deleted and/or downvoted. For your information those ...
Turns out I cannot close my own question as duplicate, because the other question I found is not on this site but on meta.stackexchange.com.
Keeping the question to allow others to find this answer that I found here:
What happens with votes cast with rep < 15 exactly?
What does recorded mean exactly?
Recorded in database, separate table. (...
Yes, no and there's no visibility of it.
There's super limited cases where mods can see who voted on a post anyway.
So if you want it up voted, you can upvote it again I'm told the results of new user upvotes are stored but even as a mod, I don't think there's any visibility or practical value in them