If you have a Glock, and if you have issues with the grip angle, and if you are keeping it, try the following:
Warning: Basic instruction to follow!
1. Apply firm correct grip of pistol with dominate/strong hand;
2. Draw pistol from holster;
3. Apply supporting grip with support/weak hand;
4. Apply proper gripping pressure (70% support/30% strong);
5. Raise pistol sights to eye level with head and neck in an erect position;
6. While maintaining sight alignment, press pistol forward toward target;
7. Dry fire;
8. Repeat, repeat, repeat, until you can present the sights on target instinctively.
If you can't accomplish this, trade the gun off! Or, find a new hobby or self defense tool.
I am not really a Glock fan (especially the finger groves), but I have one. Glock is a quality firearm, and functions well. If you have an issue with the Glock it is most likely that the gun is just not right for you - Not that the gun is designed and/or engineered wrong.