So, I can't quite remember how the dream began. I was on and off all night having nightmares, but this is the only one I can remember.

The memory of it starts off in a little abandoned building. Everything was made out of wood and it seemed to be in some forest clearing, super rural place. I grew up in Oklahoma, and my grandpa's house was also remote but didn't look anything like this, not the same location either.
I was wandering through, I think my aunt was there. My relationship with my aunt is okay. She contributed to abuse in the past but is now kind to me and helps me out financially when I need it.
I walked through the house and for some reason I knew there was something outside. I went outside and there was a little camera on a stump. I picked it up and watched it and it seemed to be a compilation of many things in my childhood. All pretty good things. Some inaccurate, but that's how dreams go, I suppose. Mostly it just made me feel fond of my school days (as that's where all the memories were from; school. None from outside of it.)
I went back into the building after watching it and came back out to do so again, once over and then a second time, but the second time I saw that the camera had been destroyed and there was a hole in the log as if it had been burnt. I looked up and saw my former stepdad, who was a terrible abuser of mine. He is dead now, died early this year. I was happy about it.
He stood there, fishing. He laughed at me when I was upset, and told me that I should just die. I yanked his fishing line up and snapped it. That's when I woke up - my fiance awoke me because I'd been crying.

So I just want to know what you all think it means. I am 19/trans male, moved out of my abusive household 3 months after turning 18, fled to a different state without the knowledge of my family until I was already gone. I haven't seen them since and haven't talked to my mother in about a year. I think about my stepfather a lot, but I usually don't dream of him. And I'm confused as to why I woke up crying. I used to have nightly nightmares but they never made me wake up crying. This doesn't even seem bad enough for that. Why was my reaction so intense? Why the strange dream, and what does it mean?