It hurts; it's insulting; it's nothing personal to them, but it is to you.
Big Blue simply doesn't care.
So you shouldn't anymore. Take care of anyone that works for you, but anyone above you that wants something above and beyond whatever the daily job is, not so much.
If you can look at yourself in the mirror and be good with how you performed while you wore the uniform, the fcuk 'em.
Be prepared for the system to cast you out immediately and some 'bros' to avoid you. Maybe because they don't know what to say but more likely they now view you as unclean, they made it why didn't you?. Fcuk 'em.
Look at some folks who did get promoted during your time and you wondered "Da fuq?"
And the same for folks who didn't that you knew were solid officers in the job.
You served your country; you stood up and raised your right hand, not many can say that in the big outside world.
Have a whisky, rub some dirt on it, then get out and make some bucks in the outside.
Sorry.