1. I've never got downvoted for asking something that could be found by googling and don't downvote anyone else for it (unless it's the blatant "give me the codez" type of question). In fact, usually such questions are considered a low-hanging fruit for those answering the question (and who know where to look).
2. My spelling/grammar errors get corrected by users with editorial powers (and I try to do the same).
3. I consider this the advantage of the site: incorrect answers get downvoted, correct answers get upvoted.
So in retrospect doesn't it show you weren't qualified to answer, and that the downvoting, by lowering the visibility of your answer, is doing its job? I.e. that the system is working as intended?
As for not being told why you were wrong, surely you could have asked in comments and gotten an answer.