Wow, what would it take to get kicked out of the Army these days? I watched a couple of folks get separated for being half that weird.
I can answer this, being a DS and all...
Before the Army said "Oh, we're overstrength!" it was damn near impossible to kick someone out unless they did something seriously *expletive deleted*ed up. Now, right around the time manning went crazy, that all changed and it got way easier. My final cycle in basic training we chaptered something like 12 soldiers.
Now, there are a few more issues at play here. One, when something like that happens, basic training units tend to start first, since they're already familiar as hell with the paperwork required to chapter Soldiers. The other issue is a continued degradation of the NCO corps due to too-fast promotions, good NCOs getting out, and poor NCOES.
The simple fact is: Mannings leadership failed. Both him, and the Army.
They failed because they didn't recognize his behavior early enough to either correct it, or get him the f**k out. They also failed, repeatedly, to adequately dick-slap him with some UCMJ / court martial action when they had a few opportunities.
This kind of weak, "ignore the problem" leadership is a big problem in the Army. it's both a source of my frustration, and also a big reason why I'm still in.