Being cheap? No, its how the draft of the part has to be done so it can be released out of the mold. simple as that.
If it was a poor design why had everyone COPIED our design?
The mount is straight just like the OEM one( the OEM one is a thin stamped metal so its not really in issue. The mounting base( tunnel) is at a slight angle so you will always want to go perpendicular to the part you are bolting to. the angle on the bottom is for drivetrain clearance Clarance.
Hope that clears some things up.