Well I'll admit I've skipped a few posts so if what I am saying has already been said I'm sorry but I have two main points:
1. Glenn and Maggie are still alive so as far as a ZA goes that is not a failure. Granted, he may have put them in a bad situation but until one of them ends up dead it cannot be considered a failure. These are not normal circumstances so all that matters is survival.
True its a TV script the writers could make Glenn sprout wings and bullet proof armor if they wanted too. Real world = bad guy gets the drop on you, you are dead.
2. As far as fitness and physical prowess I'd say the gov is not exactly a physical specimen. He is in good shape but it was not his physical stature that got him in the position he is in. In fact, I bet those military guys he gunned down were in much better physical shape and had all the training in the world. His greatest attribute is his ability to manipulate and control people (including people that could probably "take him" if it came down to it) and his ability to seem very unimposing and nonthreatening. Like I said he is probably in good shape but from what he said he was just an average joe that had and average job. Probably didn't run marathons or ironmans. Just knew how to use people to get what he needed.
Maggie/Glenn were written to survive, real life bad guy gets drop, good guy gets bullet in head = dead.
Once again its a tv series writers . Real world = It would have been a fire fight and governor probably would have been injured or killed. The soldiers would not be that stupid, they would have set up a perimeter and have people walking that perimeter keeping guard for hostiles walkers or humans.
Only the weak minded are manipulated and controlled. Even Jim Jones, David Koresh, Charles Manson only found a limited number of followers. Lets not forget everyone in Woodsbury hasnt seen the Governor darkest side. He is good at hiding that it seems.
Still he doesn't lock down his quarters as Michonne was able to get into it, Merle has had plenty of chances when he was alone with the Guv to take him out. The governor seems way relaxed in his environment.
I could write a millions way for it to be done but im not the writer and I wouldn't want him killed just yet.