Seeking Advice for Anger Management

[Melancholy]

The first thing I would like to say is that deep down everyone has something good inside their hearts and the ability to change to a good person.
If someone refuse to abandon their evil ways this happens out of ignorance and other possible reasons.
This is just what I believe. I am an open-minded person, so you can offer me a different way of thinking if you feel like I am wrong what I am saying.

Okay, enough of the beating around the bush. It's time for the real problem I have.
The title pretty much says it. I am seeking advice for anger management.

Sadly, I have serious issues with outbursts of rage. (or I don't know how I should call it, keep reading)
If someone treats me in a bad way, pisses me off or keeps provoking me I turn into a passive aggressive person.
I eat the negative emotions inside me and feel extremely pissed off but I do not act on my anger or act in violent ways but I am so extremely angry inside me that I imaging inside my mind to beat the shit out of this person who is pressing my buttons.
The outbursts of rage I am referring to happen inside me and get reflected in reality in passive aggressive behavior.

My question is: How can I deal with a very difficult person which has done something unforgivable to me, I hate deeply and have a grudge on?

What are the most important things for me to do to deal with my anger? What can I do to be more likable to others?

I feel like that I am very unpopular and hated by others. I am all the time aggressive and feel like I am pissed off all the time by other people.
After a stressful day I am listening to aggressive music to forget about the world and all the suffering I went through in my life.
Another thing I want to mention is that I feel like that I am miserable, that my life is ruined and that there is nothing I can do about it to turn my negative bad situation into a good one. It feels like torture. I always suffer hell. This suffering never stops because there is nothing I can do about it.
I am way too incompetent to change myself and turn my negative bad life into a good one.

I am very lonely, depressed and unhappy person who is very miserable deep inside me.
I have learned to detest all people, because I had so much suffering in my life.
I know I have many issues with myself, I know very little about the world and I feel like I am a failure.
You can think of me as a very ignorant person who knows way too little about the world and has a lot of lower conscience thinking. (I know this is a problem)

I hope someone can help me and give me good advice so I can change for the better. Thank you in advance!
If you have questions ask me. I am going to give you more information's if you need any but only the things I am comfortable saying.
Please help me!!! You can offer me a solution, so I can change for the better for everyone. Feedback is appreciated.

Kind regards Melancholy, the owl.