You've got a great reply from GeminiSun.
The last thing you said however is a very common misconception, especially among individuals who have a stressful Mars-Pluto contact.
Releasing anger in whatever form (yelling, breaking stuff, engaging in endless repetitive conversations/arguments while trying to convince others and/or looking for support...) is not the same as dealing with it.
People who do not know how to deal with their anger think that they are dealing with it because they vent it and then they calm. What they are is not calm, they are mostly tired and feel somehow that they've affirmed their identity. True peace comes from understanding their emotions, the global situation and dealing with all of that and everybody involved in a constructive manner. Otherwise, no matter how things look, anger gets bottled up and people are more prone to feel sensitive and blame others for their emotions (e.g. "you made me angry")
Dealing with emotions is something that is LEARNED, it's not a "built-in" skill.
Now, you being a troll is your choice. The need for being anonymous is indeed a Scorpio trait (you're Sun is in the 8th, your asc is in Scorpio, Pluto in the 1st), but what you do in that anonymity counts.
Btw, even though dealing with emotions isn't written in our DNA, being prone to negative thinking is, since it has evolutionary advantages. However, these advantages (when our ancestor heard a noise and thought it had been a lion, then ran away and survived) in our day and age can turn into disadvantages when negative thinking is given priority over constructive.
The fact that you can be anonymous is how you can keep this up, because you are not accountable for you actions. Nothing matters, because there are no real consequences. what's the worst that can happen? Being banned? No problem, you just create another ID.
So, the question is not why you are such a troll, but why do you find it more fun than anything else? Here's where your choice lies