What is a hater?
A hater is someone who discredits, devalues or downplays your accomplishments.
It doesn’t matter what you do. It doesn’t matter if you do nothing. Someone is going to say something negative about you. You can’t do anything about these people. All you can do is give them something worth talking about.

These types of people are fueled by jealousy and contempt. Your failures make them happier than their own success. To them, everything is a zero-sum game and they only see scarcity and limitation.
Why do haters exist?
I’ve had a lot of haters in my time. Some of them are justified, and some of them seemingly hate without reason. But after looking back and reflecting on my experiences, I’ve come to realize that all haters have a few things in common.

Haters gonna hate: 5 reasons why you have haters.
Self-improvement
Everyone wants the good life. Few people are willing to do the work necessary to get a good life. If that’s you then learn how to get your life together here.

Rather than elevate themselves to your level, haters would rather waste time trying to drag you down to their level. The quickest way to get haters is to succeed.
Jealousy
Your improvement may bother people who are used to you existing below their level. They may openly campaign for you to get your life together, but they secretly relish their superiority over you.

If you spend most of your time around people who care about you, you won’t have this issue. Close friends and family genuinely want you to succeed. Your casual peers will not because change disrupts the social order they rely on for their self-esteem.
A special type of hater: Internet trolls
You see this often with online haters a.k.a. internet trolls. Any time you try to produce anything of value, internet trolls are quick to give you negative feedback.

You live your life, help others by giving value, and you make money while doing it. This is enough to incite the online mob to try and burn you down.
You moved on
You often see this in the romantic realm. Once upon a time, you were interested in a person. This person did not return the interest. In the meantime, you improved into an attractive person. Now they want to give you attention.

But you aren’t interested because you’re capable of attracting higher-quality people now. You also remember that they snubbed you.
Defying the odds
If your life is on a downward spiral, people will write you off. I don’t condemn this because there’s no point in going down with a sinking ship if the captain is determined to destroy it.

Some people will be angry that you didn’t drown. They’ll hate that you’ve acquired a better life. You were supposed to be nothing. Instead, you became something.