No matter what you do, no matter where you do it, you can count on one thing. There will always be haters. It doesn't mention it in the Bible, but God created them on Day 8.
I take that back, there is an exception: You won't have many haters if you do nothing at all. But, if you are reading this, you are obviously are someone who does something worthwhile (right?), so that exception won't apply to you.
In martial arts, there is a principle that states that whenever you break your guard to throw strike, you open up a weakness where your opponent can hit you. So it is in life. When you extend yourself in any direction, you immediately open yourself up.
So the question becomes how to handle them.
The easy (and popular) answer is to tell you to ignore them and there are many good reasons to follow it..if you are going for only the superficial level. That level basically has you pretend that whatever you are doing is good enough, even in the face of massive proof that it isn't. Over 98% of our society lives in this world. It becomes a cycle of half assed work and everyone pretending that it's okay.
For the other 2%, things are a bit different. They don't beat themselves up all the time. Instead, they have learned to drop the ego that is involved in maintaining their pride. Pride, if it exists (and it almost ALWAYS does), is based on the standards of learning and development that they hold themselves to.
When someone is striving to be the best, like an Olympic athlete, the fake ego dies because they have suck more often than anyone. They know what it is to suck. The satisfaction comes from knowing that they are there, everyday, working to hit the level of excellence that they have achieved. In fact, they rarely see it as excellence, because they know how much farther they have to go.
At that level, handling haters has more to do with ignoring the venom. But you have a reason to ignore it. It's distracting you from your goal. From being who you want to become. Really, you have no choice but to ignore it.
How To Handle Haters? Focus on your path with such intensity that they become like a distant static to the strength of your signal.