I have no problem with the Glock or its grip angle but then I don't mind the grip angle on other pistols, even the Luger or Ruger Mark II. The brain, hand and eye adjust real quick.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
You'll remember the quality of a gun long after you forget how much you paid for it.
US Army 1966-69, VFW Life Member, Retired Geek