Hey WizLore, I don't know if it solves your problem, but I was facing a similar issue and used the following workaround:
1 - duplicated the animation and named it "left"
2 - changed the angles of the left animation using the formula: 360 - right_angle = left_angle
It works nicely in a simple animation but takes some extra effort. Not sure if it fits your use case, but here is the example, just in case someone finds this topic on Google as I did.
1drv.ms/u/s!Aqgy3_mD5UMZg7lg7LqiiYv7HhNaxg