I still like Glocks for several reasons, mostly their simplicity and the availability of parts and holsters, but I have to agree with the OP that Glock is doing more wrong than they're getting right these days. They no longer use Tennifer, most of the crucial internal parts are now MIM (which I believe is to blame for their recent brass to face debacle), and yes the backstraps are a joke compared to their competition.
But, I still think they're worth owning. The only reliability issue with any factory Glocks was the BTF issue, which seems to have been solved and isn't really a genuine reliability issue as it were. It was also widely reported that the BTF only happened with standard pressure ammo, and the rumor was that Glock had streamlined the pistol to work best with NATO spec 9mm. I don't have any idea if that's true or not, but Glock was apparently going after military contracts in recent years, and the BTF issue seemed to be nonexistent with +P ammo, so it's not an unreasonable theory. Still, though, it's not confidence inspiring that the BTF issue was so hit or miss, as consistency and quality always go hand in hand. So at the very least quality control was lacking, which, again, I believe is a result of the MIM parts.
Also in Glock's favor, they still do very well in all kinds of torture testing, and they still run forever and a day with minimal servicing. They're also lightweight and definitely well within acceptable accuracy parameters. As mentioned, parts, magazines, and holsters are widely available and inexpensive, and the gun is so simple that anyone can work on one. The fact that they can easily be converted to other calibers also makes them pretty nifty for possible situations where ammo or parts become unavailable due to legislative or supply problems.
As for the grip, it's admittedly bad by more recent standards, and the backstraps don't help. But, it is possible to make a Glock as comfortable as any other handgun by doing a grip reduction with some other tweaks. I don't normally go in for modifying factory guns, but the grip reductions don't change any of the internal parts and do not effect the structural integrity of the frame if done correctly. I did a grip reduction, beaver tail, trigger guard undercut, finger groove removal, and bobtail; and my Glock is, for me at least, as comfortable as my 1911. I also filled the backstrap with acraglas with multiple mechanical locks, so the integrity of the frame was actually strengthened while maintaining full flexibility. As opposed to JB weld or marine tex, the acraglas should retain the recoil dampening effects of the backstrap, so literally nothing has been changed in terms of how the gun functions. It was admittedly a lot of work, but it didn't cost me hardly anything.
