http://youtu.be/pbkCkIuTiBc
1st issue - Someone doesn't know how to adjust to brick grid.
2nd issue - You screwed up there, no-one else gets that problem more than once or twice in a lifetime.
3rd issue - Windows are thin and the vehicles gitch with every collision no matter what they crash into.
4th Issue - No clue what happened there, I just know it came with the launcher update. Therefore Badspot's fault.
5th Issue - That's what happens when you don't use the smooth tool in the editor.
6th Issue -That's when you add an invisible border to the png.
7th Issue - Badspot never bothered giving collison meshes to trees, that can easily be fixed by putting an invisible collision mesh in.
So most of your reason's for terrains and interiors sucking are due to laziness of behalf of Badspot or the average map maker.
