People are calling me noobs in gunbound because im not using "true angle" but i dont know what that is. it looks like they are shooting the same why as me.

True angle is when there are 2 colors on your angle bar. It's the middle one which is the brightest one. They're telling you to use it because it does alot more damage.
Only use un-true angle (lol) when you cant use true angle because you are possibly stuck in a hole.