Is it wrong?

I don't know if "wrong" is the word you are looking for. I just know you have to work through it. So you may heal and move forward. Hate is a poison that consumes you. And so, you have to ask yourself how does this hate help you? I am not asking you to forgive them. That is unreasonable.

It isn't wrong per se, but wouldn't your spirit feel so much better if you could expend your energy on people, things and experiences that bring you joy rather than waste another minute expending it dreaming up acts of vengeance and how you'll find justice to people not worth another iota of your energy. Trust the universe will get them theirs.

forgiveness is not always a gift you give to the person who wronged you, sometimes its just something you do for yourself to free your heart from the burden of keeping anger and hatred within yourself. I compare this to the idea of the voodoo doll that you puncture to hurt someone else, only with hatred you are the voodoo doll that you hurt in the hopes that it will make the other also hurt (and usually it doesn't, just like the voodoo doll).

As long as you don't act on it then probably not,I'm sure alot of others feel like that aswell,I know I have done.

It's a normal reaction. But start dealing with it sooner 'cause it will consume you. The more thinking and energy you put into this thinking, the more memories and other thoughts you associate with these negative thinking patterns.
Even if you reach your highest point of anger, that still won't do anything to them, but it will take a huge toll on your health.

Not a matter of right nor wrong. Just kinda holding yourself hostage. Because while you're feeling anger and hatred, wasting the time you have now, they're obliviously going on living their lives.

Or as it's been said, it's like drinking poison and expecting the other person to die.

It's only fair. No reason to let injustices go without someone at least understanding what they have done. More power to you.

It's not healthy to carry all that heaviness around.

Not wrong, just self-defeating...learn to forgive!

No that's perfectly natural. As long as you dont actually go and cut their head off.