I never ask bad questions that show no research effort, are unclear or
All that happened here is that someone disagreed with that analysis. Twice.
It isn't the end of the world; take a look at the questions that were downvoted, honestly try to identify and correct any flaws that might have caused the downvotes and move on. It could have been anything from coincidence to someone angrily looking through your profile after you did something to arouse their ire.
If this becomes a serious problem (occurring regularly or with a greater number of downvotes), you can bring this up on Meta and/or flag one of your posts for moderator attention and explain the situation. Do note that there are already measures in place to counteract serial voting, although they don't catch all possible cases.
It is just as easy here to get cheap upvotes as cheap downvotes, so this shouldn't be a significant setback.