Caught Dad Masturbating on Bed

This happened a few years ago. I already had PTSD as a child, but after this event it became much worse. To make a long and really uncomfortable story short, I came home from a friend's house early one morning to find my dad completely naked on my bed masturbating to porn on the computer that was in my room. I was in complete shock, felt sick to my stomach, and left as soon as possible but was forced to come back home after a few days. I didn't know what else to do. On the screen, I saw a girl who looked young, probably 18, but no child pornography I'm assuming in the split second that I looked. I have also found porn in his internet history before, so I know he already did this multiple times before. I also used to be a very deep sleeper and he'd break into my room to use the computer, so for all I know he could've masturbated in there while I was asleep.

My mom has told me he might have molested me and my other siblings when we were babies or toddlers, but she isn't sure. She has been through a lot of traumatic events in her life so she's blocked a lot out. I was sexually, verbally and physically abused as a child by other kids and friends of the family as a child. I also would constantly see pop-ups of child pornography on the family computer. These were children from toddler to elementary school age. I've seen child pornography of preteen boys on my sibling's computer before. My mother also recently told me that she would see them looking at gay porn, but of adults. I've heard this is common with victims of sexual abuse/molestation/incest rape.

When I was a preteen, my dad would call me "sexy" referring to how I was dressed, and a "bitch" or "spoiled bitch" when I'd go off on him for smacking my ass as I walked by. He'd also tell me to "go make him a sandwich" and "grab him a beer". He's stared at my chest too throughout the years. He only did this when nobody was around to see or hear it. He wouldn't ever knock on my door before entering either, so numerous times he'd catch me in the middle of changing. When I was around 7-8 years old, he'd also take baths with me and I had to share the same bed with him. When I was 11-12, I had to share a room with him, so all of this and more has affected me in ways I cannot put into words.

After the event of him masturbating on top of my bed, I went to two family members for guidance, help, support. I have also recently opened up to my therapist about this. They all told me he did it because the computer was in my room, he's overweight, and does not have his own room. My therapist told me men are much more visual. She told me, "It's not that you couldn't believe it happened, it's that you couldn't believe why it happened." She has had multiple marriages. One of my family members immediately told me to forget what I saw. He has openly said sexual remarks about other women on social media even though he has a girlfriend. My last boyfriend, who was abusive and has PTSD, bipolar disorder, and borderline personality disorder, also told me that men are more visual and less emotional. I didn't even know this about men because I have been with other guys who did not feel the need to do that while we were together. So, all of these people have had their own sets of problems.

What do you guys think of this? Do you think it's ok that my dad did what he did? Or am I just thinking this because I'm surrounded by people who have an entirely different kind of perspective based on their own problems?