I wonder how far that goes, honestly. Him not realizing that he is gay is something that I think might actually hold some water. Think about how often he seems to recreate things that have happened in a totally mystifying way. There's a distinction where I think he's lying or wrong (losing Twitch partnership) and times where I wonder about his perception of reality (any of the I did nothing wrong times in games or life where he seems convinced he was totally in the right), but I also see a third situation where it makes me wonder how he sees reality, and more importantly how he sees himself. We go back and forth about how he has this disorder or that disorder but the thing that I would really love a real answer to gets lumped into that discussion: what is Phil's perception of self?
If you forced me to, I can explain what I think I'm about. What my values are, what my interests are, strengths and weaknesses, insecurities and confidences, and most importantly why. I don't think Phil could answer any of those, or explain the whys. I don't think he's ever taken more than a second to be introspective, or to ask himself what he wants out of life, or who he wants to be. I don't know how or why, but I don't think he has a perception of self beyond that of a child: everything is outside of his control, and nothing has consequences or at least they shouldn't have consequences for him.
Should note, not a psychologist, I just think about the concept of self a lot.
EDIT:
@Frogga I'm aiming this at you since everyone is quoting the wrong person. Have a great day bud.