Thanks for sharing Nitro! My fellow Canadian! I'm not in BC but ON which is very far but in the Great North nonetheless!
I know exactly what you mean about experiencing a lack of clarity all the time. For me, it's like I am constantly in a dream state. When I'm in a conversation, I find myself repeating what the last person said to make sure I understood them properly. Whenever I see or hear something there's a delay in processing what exactly I'm looking at or hearing.
I understand that you are feeling discouraged. I also felt that way after reading posts from people who are 3 years into PCS. I have a very compassionate doctor who reminds me all the time that this is my reality for right now and to take things one day at a time.
I have also taken this as an opportunity to listen to my body and reconnect with myself. I keep 2 journals: 1 to record my daily symptoms from which I provide my support team of my progress/changes and the other one is to record my feelings and thoughts. The hardest part is to accept that this will not go away in a week or two and there's a whole bunch of grieving that comes along with that - like you mentioned you miss being your old social, active self and sex. Getting all those feelings out in a healthy way can be helpful.
Going back to work to early can actually delay the healing process and produce setbacks so I would work closely with your doctor to set an appropriate time to return. I wish you all the best!
A return to work date has not yet been sent for me but I will post my progress once I do return.
Take Care,

SkiC