Regardless, your experience has nothing to do with this topic or DB. And you could have gotten a partial refund quite easily, even after taking alternative transport. Refunds for delays is something DB has worked out pretty reliably. Filling out the online form is trivial, and if you use the DB app most fields are prefilled.
I disagree. I booked a train ticket online at one single place. It was a single ticket with a QR Code. It had connections. I don't care who the underlying providers are. I paid to one entity. It was their job, not mine to track.
