I'll give it a go. Hopefully this post is pretty succinct.
There's a lot of stuff I don't like/agree with about our USAF, but in reality I'm mainly getting out for two reasons:
1) I'm not the type of person that likes to stagnate in life, but if there was one word that I could use to describe my USAF "career", it would in fact be "stagnation". I can't honestly look at myself in the mirror and say that I'm okay with my sub-mediocre career and let the next 13 years of my life be wasted just to make it to retirement.
2) I want control of my life again. My biggest takeaway from my time in the military is that our time on this planet is in fact limited and it is precious, so don't waste it.
As much as I actually am running for the exit, I am proud to have been a part of the operational arm of this organization and thankful that I was able to make direct contributions to some of the biggest events in our time... but I am definitely looking forward to the next chapter of my life.