I believe you are going about this the wrong way @Haejin You are spending so much time and effort making these posts giving more and more attention to them. The number 1 rule on the internet is don't feed the trolls, the more you feed them the more they will bother you for more attention.

Keep producing your high quality analysis, those quality posts do extremely well and are very educational. Don't let one bad apple spoil the bunch, once they realize you don't care about them they will move on.

Is it a flaw with this platform? Yes! But this is fairly new and some things need to be worked on. Just keep focusing on building up your community like you have been and I know you will continue to grow your audience and blog.