Nightmare of Helplessness-Interpretation required.

This is a paragraph that I have found as a dream interpretation. I don’t know why I see some horrible dreams full of helplessness. I need some more clues or clear interpretation as to what actually they mean.

So, today I saw one such dream, or I say, a nightmare. Dream was quite long but I am writing about only that part that is bothering me the most.. My father and I were in a marketplace and he had an argument with a wholesale merchant about the price of some products, which he denied to buy, started going down a lane in the open in frustration. I was following him. I was a kid. I heard the merchant calling some men for attacking us. My father was walking with a good speed, I was lagging behind. I was trying to speed up as he was not listening to me when I was trying to tell him what I heard. Suddenly, a group of four-five goons came, held him and did beat him so mercilessly. They broke his that arm completely whose elbow was broken in real. He was drenched in blood. He initially tried to fight but all in vain. It all happened within seconds. They kept on beating him, and finally he died. I was at a distance, some people held me and I screamed like never before out of innate helplessness. Then I woke up.

Once in a while, I see such nightmares of immense helplessness in which always a group is attacking, mostly I see myself being attacked by mob, stabbed with knives, or killed in some ruthless ways. Fights, Bloodshed and death by a group or mob is the main theme of most of my nightmares. This time it was related to my father, which increased my intensity manifolds, that too about which I could not do anything. This was the feeling of helplessness like never before.

Is there anyone who can interpret dreams/nightmates and their symbols paychologically or throw some light?