The key explanation for failing to stop at the station is that the train was on the wrong track.

    > "Apparently we were not registered at Troisdorf station, so we are on the wrong tracks"

If the train was on the middle track, stopping would introduce risk and disruption by slowing/stopping the other trains travelling on the high-speed non-stopping line, and also endanger passengers who would have to dismount at height from the train onto an active track, cross the active track, and climb up to the platform.

Once the train was routed onto the incorrect track, correcting it was likely to be impractical (infrequent track transfer points) and stopping on the high-speed track would would be excessively disruptive and dangerous.

It was extremely easy for that train to stop in Bonn-Beuel, which is anyway far superior to Troisdorf for a train that was originally scheduled to stop at Bonn Central Station. Failing to stop there shows perfectly how little DB cares about its passengers.

Lame excuse. There has to be a better alternative than to take them an hour in the wrong direction. Stop and shunt to the right track. Stop at one of those other 15 stations they skipped. But the best would be to simply avoid these kind of unnecessary errors in the first place.