Probably best to follow the advice on the Komoot website - either:-
https://support.komoot.com/hc/en-us/articles/360039392871-Reporting-an-issue-in-the-komoot-routing-system
or
https://support.komoot.com/hc/en-us/articles/360022830972-Improving-the-komoot-map-using-OpenStreetMap
In this case, I think Komoot is ignoring the tracktype tag, and, because this track (https://www.openstreetmap.org/way/33743334) doesn't have a surface tag (e.g. surface=dirt), it's assuming the track is good quality.  In that case, adding the surface tag might help.