I noticed leaked grease on the left outer boot of the CV joint. Upon closer inspection, a small crack was found pierced by some object.

pierced boot
The case, of course, was recognized as non-warranty and a little less than 5000 rubles had to be unfastened for replacing the anther.
Looking under the bumper to see what are the chances of repeating such damage, I saw the following picture:

As you can see, the boot is open to everything that flies from the road. And it was done as if on purpose.
I cut out a small shield from the plastic from the trash can and attached it to the mudguard under the bumper.

Holes in the splash guard

Plastic from the trash can has a rounding and, as it were, continues the shape of the fender liner.

Front view
Now, in theory, everything that should have flown into the anther will fall into this shield or be directed by it down under the lever.
The part turned out to be something like this:

Source: https://www.drive2.ru/l/4057668/