Design of metro maps from Yandex

Recently went to see the map of the subway (St. Petersburg) on ​​Yandex, and just was horrified. I don’t understand how such a solid project can afford such a vigorous design?

Here for comparison - on the left is a map from Yandex, and on the right is the official design that hangs in all cars:


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Yandex's red line is generally epic! Try to select any branch on the Yandex map (well, except for the blue one) and look at it separately. Some kind of breaks, turns ...

And if you take a map from the St. Petersburg metro - each branch, even separately, looks good.