SpcL, hi...and welcome.
Sorry you have reason to be here, but glad you found us.

Jmo/jme because we don't DX anyone...we share what it was like for us and what we are doing about it.
SpcL, the actions/inactions and the thoughts are right at the top of the list for PTSD symptoms.
Before I say anything else, please hear this; this is not mild, it might be denial of PTSD but it is not mild in nature.
Do you really think what is happening with you is normal? There is a thing called Shut Down...as in stuff the feelings and tough it out. Ain't as easy as it sounds, is it?
And it might be the reason you are not having the flashbacks...yet.
We also tend to think that we didn't really see the "bad stuff." In reality, we saw plenty, swallowed long and hard, and behaved as though the events were common due to the circumstances of war.
BS. Nothing, absolutely nothing, seen in war is common. It's horrific and the perimeters of the heart become impenetrable...on guard 24-7, 365.

You mentioned MTBI...your own?
Your research has shown you the effects this is having on the brain...what is your compensation ratio? Memory and personality changes are part of it as you know, SpcL.

GTFO...the door did not hit my *** as I left

Startle reflex in super drive?
My last episode I hit the floor while shouting 'Incoming" when a chopper flew near my house...house is located near a military installation.
Shouting and running through my head was the fear we wouldn't have enough blood in the OR again.

Sitting with your back to the wall in a restaurant? I still do and so does my ex.
Ditto on checking the tree line for snipers and yeah I can take 'em or reaching for the sidearm I no longer carry.

Re racism. I was before I ever left Nam. My buds have admitted the same thing. It's frigging hard not to be when they are shooting at you...or you are taking care of the wounded.
My nursing sisters and I hated taking care of enemy combatants. SOP was our guys came first, any women or children second, them last.
We would bribe each other or call in markers so we didn't have to deal with them.
It took years for that to ease...but it did ease.

SpcL,
You left behind that man; he's gone. Period.
The new you is still in development...try and be patient.
but
Grieve over this loss.

You are taking steps to adjust to civilian life. It takes time. Length of service is not related to the adjustment and neither is your area of deployment/MOS.
Doing this takes courage and I salute you for doing it.

Keep posting and let us know how you are doing...we care.
I care.

Thank you for your service to our country, SpcL.

In Peace
Catherine