To each their own I guess?
Your spot on Ping. No one worth their salt will say Glocks can't hold up, perform as designed, or are a problematic firearm. They just work.
Glock dominated the market for so long, when others like Springfield XD's, FN(X) series, S&W M&P's,....finally caught up, they offered options Glock never did. Adj. grip size, ambi features,....etc,...
Now that those firearms are cutting into what Glock dominated in previous years,,..Glock is simply playing catch up. That's not a bad thing, it makes better firearms for us all.
My G21 is a big chunk of reliable, durable, railroad tie. That shoots even Wolf 45 ammo, dirty, fouled, and has yet to give me ANY issue.
The grip is too big, even for my big hands, the grip angle is not the best for me, the finger grooves are too pronounced, but the damn thing works every time, is very accurate, and I can't knock it for what it is designed to do.