Glocks are supposed to be easy to shoot, easy to clean, easy to fix, easy to replace because they're inexpensive, and easy to not fall in love with because they're ugly and made from plastic. Ick....
They work.
I won't own one but that doesn't mean I don't think they'll fail to do the job they are intended for. I just happen to (1) dislike plastic (okay, polymer) pistols (I do have one and it's way better than a Glock because of reason number 2) and (2) I dislike their triggers, etc. I'll take traditional double action every time.
That doesn't diminish the incredibly good record of Glocks in the hands of police forces all over the Americas, among other places. In Latin America they are simply called la pistola negro - the black pistol, and they are much admired and used. Completely reliable and low cost, low maintenance, etc.
Just like an AK-47. I won't own one of those, either, but millions of folks love them and they are the rifle of choice for all of our enemies and have been for generations.
Two excellent machines that I happen to not like but that's totally personal and is in the YMMV category for sure.