It's not that Glocks are inaccurate, but rather that the trigger makes accuracy so hard to prove. The Glock is a good pistol let down by a poor trigger, and it doesn't have to be that way - even on a $500 gun.
How would you change the Glock trigger?
Glock is not for everyone, and it doesn't have to be. It's just interesting that there are quite a few people who want them to be something they aren't. And there are those that try and configure a Glock into something it isn't. Never quite understood these reasoning's as there are lots of good firearms out there. Want a manual safety, S&W and Sig got you covered, want a grip safety Springfield XD, want hammer fired there are countless choices there and DA/SA, SA, DA, decocker, manual safety, etc.
To me
what I like about the Glock trigger for self defense is the following:
1. The striker is not fully charged, and held at a stored energy amount (~60% cocked) not enough to ignite a primer
-90-100% fully cocked strikers: Springfield XD, Sig P320, Walther, S&W M&P, HK VP9
2. The trigger dongle is an easy and effective inertial and foreign object mitigation safety
3. The 5.5# trigger allows for more than sufficient accuracy and ease of shooting at self defense scenarios, and one can get other disconnector weights if one so chooses to, me I'll just practice and get proficient at a 5.5#, it hasn't prevented me from being proficient.
4. Any "grit" in the glock trigger mechanism either smooths out over time or takes 20 minutes of minor polishing of the cruciform, trigger bar, and firing pin block area to smooth it out.
5. The sponginess of squeezing through the last bit of charge on the striker is something that one gets used to.
6. Nothing is between my trigger finger pressing the trigger and the gun firing.
7. It's design reduces to a minimal amount of parts, and that is the peak of a design's evolution. As this makes maintenance, understanding and reliability better (in most cases)