confused and frustrated

I have recently moved in with my dad after living with my mom for 6 years. His boyfriend makes me very uncomfortable. He is always looking at me, talking about me like im not in the room, and micromanaging me while i do simple tasks. This has been a problem since before i moved in. He has an obsession with the house, the cleanliness thereof and how it's decorated. He also is very closed to criticism and will constantly interrupt me while we have conversations etc. Lately, I feel him encroaching on me more and more. He apparently let things slip in the beginning, and it seems like hes working his way in to try and be of authority. Im 18, this is also not the first adult in my life i have encountered like this. I do not feel comfortable having personal conversations with him nor giving him feedback. Im not in charge of him. I had a conversation with my dad last night about a situation that happened–His boyfriend told me he needs me to not bring dishes to my room anymore. But, his statement didnt seem to be open to conversation. I just said i accumulate an excess bc of my cat food, and i have to bring them upstairs. That was the end of it, but i couldnt keep the situation off of my mind. I brought dishes upstairs that night as well. Not out of provocation, honestly i didnt even think about it.

My problem is i feel like im outside of my body when im near him. Like im watching myself do things but im not in control. It feels like im in a dream and i cant control my thoughts. I told my dad that i would like him to talk to him about not telling me what to do. He went on this lecture of how i shouldnt take things personally. I dont think that this is the correct situation to worry about emotions. this is a personal situation and i think it should be handled accordingly. He repeated the point over and over about how in the "real world" you dont get to decide how people talk to you and i shouldnt let it affect me. Like i havent been living in the real world learning how to navigate it myself the entirety of my life. We talk a bit more and i reach a conclusion that the reason the situation was frustrating was i didnt know how to defend myself. I felt like i couldnt in the situation. like i was verbally paralyzed. I didnt know what words would portray how im feeling while also being clear and not disrespectful. Im overall feeling really stuck. I dont know how to interpret the situation anymore and i just want to rip my hair out. I feel like i keep on being put into the same situation and i cant so anything about it. I want some help on knowing the right steps to take next please <3