Wrong logfile encoding
The logfile mangles encoding of the console output.
It assumes (in my case) CP1251, where original console output is in CP866. Converting to UTF-8 from wrong encoding produces unreadable output.
If you want more consistent logging, use chcp.com 65001 first.
On top of that, I strongly suggest manipulating routes using netsh tool, not route. It allows both finer control over routing and more consistent encoding manipulation.
Edited by Ľubomír Carik