with my english will be difficult to explain but....

I had bent mine quite a few times and I learned, that ussually it is not getting bent because of the... end part, which is not foldable, but because of the lever (metal plate) BEFORE THIS END (not foldable) PART.

The problem is that the lever is lead under the pegs, and so it is too low. When you fall on the side, the lever touches the ground first.
This can be properly solved only in case, you will modify the brake lever and lead it over the foot peg. In this case when you will have a side slide, the pedal will not touch the ground, and it will not bend ... or at least very rarely.
This is (one of) my winter project!